AP Chemistry
DrOfEng
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1
Introduction to Chemistry, Periodic Table - AP Chemistry
2:36

Introduction to Chemistry, Periodic Table - AP Chemistry

This video provides an introduction to chemistry, and covers some important features of the periodic table. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
2
Atoms, Isotopes, Atomic Number, Mass Number - AP Chemistry
2:01

Atoms, Isotopes, Atomic Number, Mass Number - AP Chemistry

This AP Chemistry video explains the notation used in the periodic table, and the structure of atoms and isotopes. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
3
Moles, Molar Mass, Avogadro's Number - AP Chemistry
2:40

Moles, Molar Mass, Avogadro's Number - AP Chemistry

This AP Chemistry video defines the unit of mole using Avogadro's number, which is used to connect the mass of a substance to the number of its particles. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
4
Moles, Connecting Units - AP Chemistry
2:16

Moles, Connecting Units - AP Chemistry

This AP Chemistry video explains how the unit of mole connects other units in Chemistry. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
5
Mass Spectrometry, Molar Mass, Average Atomic Mass, Mass Defect - AP Chemistry
6:44

Mass Spectrometry, Molar Mass, Average Atomic Mass, Mass Defect - AP Chemistry

This AP Chemistry video explains mass spectrometry and how it is used to identify the isotopes of an element, interpreting the mass spectrum, relationship between the molar mass and average atomic mass, and the mass defect. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
6
Mass Spectrometry, Example - AP Chemistry
2:14

Mass Spectrometry, Example - AP Chemistry

This AP Chemistry video covers a worked example on mass spectrometry. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
7
Pure Substances - AP Chemistry
1:13

Pure Substances - AP Chemistry

This AP Chemistry video defines pure substances using several examples. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
8
Law of Definite Proportions, Pure Substances - AP Chemistry
1:16

Law of Definite Proportions, Pure Substances - AP Chemistry

This AP Chemistry video explains the law of definite proportions for pure substances. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
9
Empirical Formula, Pure Substances - AP Chemistry
0:55

Empirical Formula, Pure Substances - AP Chemistry

This AP Chemistry video defines the empirical formula for pure substances. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
10
Pure Substances, Percent Composition, Example - AP Chemistry
1:10

Pure Substances, Percent Composition, Example - AP Chemistry

This AP Chemistry video covers a worked example on determining the percentage composition of each element in a pure substance. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
11
Empirical Formula, Molecular Formula, Examples - AP Chemistry
2:57

Empirical Formula, Molecular Formula, Examples - AP Chemistry

This AP Chemistry video covers worked examples on finding the empirical or molecular formula of a compound in a pure substance. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
12
Composition of Mixtures, Formula Units - AP Chemistry
1:23

Composition of Mixtures, Formula Units - AP Chemistry

This AP Chemistry video explains the composition of mixtures and formula units using several examples. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
13
Composition of Mixtures, Examples - AP Chemistry
3:00

Composition of Mixtures, Examples - AP Chemistry

This AP Chemistry video covers worked examples on the composition of mixtures. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
14
Coulomb Force, Bohr Model, Atoms - AP Chemistry
1:32

Coulomb Force, Bohr Model, Atoms - AP Chemistry

This AP Chemistry video explains Coulomb's law and the forces between charges in an atom using the simplified Bohr model. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
15
Energy Levels, Shells, Subshells, Orbitals - AP Chemistry
2:09

Energy Levels, Shells, Subshells, Orbitals - AP Chemistry

This AP Chemistry video explains the types of shells, subshells and orbitals present in an atom at different energy levels. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
16
Shapes of Orbitals - AP Chemistry
1:51

Shapes of Orbitals - AP Chemistry

This AP Chemistry video explains the shapes of s and p orbitals, which are obtained from quantum mechanics. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
17
Electron Configuration, Aufbau, Pauli's Exclusion, Hund's Rule - AP Chemistry
2:07

Electron Configuration, Aufbau, Pauli's Exclusion, Hund's Rule - AP Chemistry

This AP Chemistry video explains Aufbau's rule, Pauli's exclusion principle and Hund's rule for determining the electron configuration of an atom. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
18
Electron Configuration, Exceptions to the Aufbau Rule, Chromium - AP Chemistry
1:59

Electron Configuration, Exceptions to the Aufbau Rule, Chromium - AP Chemistry

This AP Chemistry video explains how to determine the electron configuration for an atom which is an exception to Aufbau's rule, using Chromium as an example. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
19
Electron Configuration, Silicon, Iron, Examples - AP Chemistry
3:09

Electron Configuration, Silicon, Iron, Examples - AP Chemistry

This AP Chemistry video covers worked examples on determining the electron configuration of an atom. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
20
Valence Electrons, Noble Gas Notation, Ionisation Energy - AP Chemistry
2:12

Valence Electrons, Noble Gas Notation, Ionisation Energy - AP Chemistry

This AP Chemistry video defines valence electrons, explains how to write the electron configuration of an atom using shorthand (or noble gas) notation, and how to qualitatively estimate the ionisation energy using the energy analog of Coulomb's law. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
21
Shielding, Effective Nuclear Charge - AP Chemistry
1:51

Shielding, Effective Nuclear Charge - AP Chemistry

This AP Chemistry video explains the concepts of electron shielding and effective nuclear charge to determine the ionisation energy of atoms and ions relative to each other. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
1 comment
22
Photoelectron Spectroscopy - AP Chemistry
1:45

Photoelectron Spectroscopy - AP Chemistry

This AP Chemistry video explains the steps of photoelectron spectroscopy, which is an experiment used to determine the electron configuration of an atom. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
23
Photoelectron Spectrum, Interpretation - AP Chemistry
1:22

Photoelectron Spectrum, Interpretation - AP Chemistry

This AP Chemistry video explains how to interpret a photoelectron spectrum to determine the electron configuration of an atom. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
24
Photoelectron Spectrum, Examples - AP Chemistry
2:40

Photoelectron Spectrum, Examples - AP Chemistry

This AP Chemistry video covers worked examples on interpreting a photoelectron spectrum to determine the electron configuration of an atom. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
25
Photoelectron Spectroscopy, Example - AP Chemistry
2:09

Photoelectron Spectroscopy, Example - AP Chemistry

This AP Chemistry video covers a worked example on obtaining the parameters of the electromagnetic radiation source from a photoelectron spectroscopy experiment. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
26
Periodic Trends, Ionisation Energy - AP Chemistry
1:42

Periodic Trends, Ionisation Energy - AP Chemistry

This AP Chemistry video explains the periodic trend in ionisation energy using the periodic table. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
27
Periodic Trends, Atomic Radius - AP Chemistry
1:19

Periodic Trends, Atomic Radius - AP Chemistry

This AP Chemistry video explains the periodic trend in atomic radius using the periodic table. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
28
Periodic Trends, Ionic Radius, Cation, Anion - AP Chemistry
1:39

Periodic Trends, Ionic Radius, Cation, Anion - AP Chemistry

This AP Chemistry video explains the periodic trend in ionic radius using the periodic table, and compares the atomic radii and ionic radii of atoms and ions. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
29
Periodic Trends, Electron Affinity - AP Chemistry
1:20

Periodic Trends, Electron Affinity - AP Chemistry

This AP Chemistry video explains the periodic trend in electron affinity using the periodic table, which is the energy released when an electron is attached to an atom to form an anion. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
30
Periodic Table, Trends, Electronegativity - AP Chemistry
1:09

Periodic Table, Trends, Electronegativity - AP Chemistry

This AP Chemistry video explains the periodic trend in electronegativity using the periodic table, which is the ability of an atom to attract an electron from another atom to form a chemical bond. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
31
Periodic Table, Trends, Worked Examples - AP Chemistry
3:44

Periodic Table, Trends, Worked Examples - AP Chemistry

This AP Chemistry video covers worked examples on periodic trends in the periodic table. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
32
Ionic Compounds - AP Chemistry
2:09

Ionic Compounds - AP Chemistry

This AP Chemistry video explains how ionic compounds are formed and the number of charges gained or lost based on the groups of the elements in the periodic table. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
33
Ionic Compounds from Transition Metals, Analogous Compounds - AP Chemistry
1:39

Ionic Compounds from Transition Metals, Analogous Compounds - AP Chemistry

This AP Chemistry video explains how to name different ionic compounds formed from a transition metal, and analogous ionic compounds. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
34
Chemical Bond Types, Electronegativity Pauling Scale - AP Chemistry
2:38

Chemical Bond Types, Electronegativity Pauling Scale - AP Chemistry

This AP Chemistry video summarises the types of chemical bonds, being ionic, covalent (polar and non-polar) and metallic. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
35
Covalent Bond Designations, Bond Length - AP Chemistry
1:38

Covalent Bond Designations, Bond Length - AP Chemistry

This AP Chemistry video explains the properties of single, double and triple covalent bonds. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
36
Covalent Bonds, Polarity, Dipole Moment - AP Chemistry
1:23

Covalent Bonds, Polarity, Dipole Moment - AP Chemistry

This AP Chemistry video explains the polarity of covalent bonds, dipole moments and how to determine whether a bond is covalent or ionic. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
37
Intramolecular Force, Potential Energy, Covalent Bonds - AP Chemistry
2:00

Intramolecular Force, Potential Energy, Covalent Bonds - AP Chemistry

This AP Chemistry video explains how to interpret the potential energy diagram for a covalent bond, and identify the bond length and bond energy. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
38
Interactions, Cations and Anions, Coulomb's Law - AP Chemistry
1:42

Interactions, Cations and Anions, Coulomb's Law - AP Chemistry

This AP Chemistry video explains the interactions between cations and anions using Couloumb's law. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
1 comment
39
Ionic Solids, Structure, Properties - AP Chemistry
1:56

Ionic Solids, Structure, Properties - AP Chemistry

This AP Chemistry video explains the structure and properties of ionic solids. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
40
Structure of Metals, Sea of Electrons Model - AP Chemistry
1:18

Structure of Metals, Sea of Electrons Model - AP Chemistry

This AP Chemistry video explains the structure and properties of metals, and metallic bonds using the sea of electrons model. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
41
Interstitial Alloys, Metals - AP Chemistry
1:10

Interstitial Alloys, Metals - AP Chemistry

This AP Chemistry video explains the structure of interstitial alloys using steel as a typical example. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
42
Substitutional Alloys, Metals - AP Chemistry
0:44

Substitutional Alloys, Metals - AP Chemistry

This AP Chemistry video explains the structure of substitutional alloys using brass as a typical example. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
43
Lewis Diagrams - AP Chemistry
2:09

Lewis Diagrams - AP Chemistry

This AP Chemistry video explains how to draw a Lewis diagram for a molecule or polyatomic ion using a set of rules. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
44
Lewis Diagrams, Resonance Structures, Bond Order - AP Chemistry
2:08

Lewis Diagrams, Resonance Structures, Bond Order - AP Chemistry

This AP Chemistry video explains how to draw Lewis diagrams of the resonance structures of a molecule or polyatomic ion and determine the bond order. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
45
Lewis Diagrams, Formal Charge - AP Chemistry
2:17

Lewis Diagrams, Formal Charge - AP Chemistry

This AP Chemistry video explains how the formal charge can be calculated and used to determine the most likely correct Lewis diagram of a molecule or polyatomic ion. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
46
Lewis Diagrams, Reduced Octet, Formal Charge - AP Chemistry
1:39

Lewis Diagrams, Reduced Octet, Formal Charge - AP Chemistry

This AP Chemistry video explains how to draw the Lewis diagram for a molecule or polyatomic ion where the central atom has a reduced octet. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
47
Lewis Diagrams, Expanded Octet , Formal Charge - AP Chemistry
2:10

Lewis Diagrams, Expanded Octet , Formal Charge - AP Chemistry

This AP Chemistry video explains how to draw the Lewis diagram for a molecule or polyatomic ion where the central atom has an expanded octet. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
48
Lewis Diagrams, Free Radical, Formal Charge - AP Chemistry
2:27

Lewis Diagrams, Free Radical, Formal Charge - AP Chemistry

This AP Chemistry video explains how to draw the Lewis diagram for a free radical (has unpaired electrons). This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
1 comment
49
Lewis Diagrams, Resonance, Formal Charge, Worked Examples, XeF6, CH3COO-, CH3COOH - AP Chemistry
6:03

Lewis Diagrams, Resonance, Formal Charge, Worked Examples, XeF6, CH3COO-, CH3COOH - AP Chemistry

This AP Chemistry video covers worked examples on Lewis diagrams. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
50
sp Hybridisation, VSEPR, BeH2 - AP Chemistry
2:02

sp Hybridisation, VSEPR, BeH2 - AP Chemistry

This AP Chemistry video demonstrates how to draw the geometry of a molecule using bond hybridisation and VSEPR, where the central atom is sp hybridised. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
51
sp2 Hybridisation, Trigonal Planar, VSEPR - AP Chemistry
2:01

sp2 Hybridisation, Trigonal Planar, VSEPR - AP Chemistry

This AP Chemistry video demonstrates how to draw the geometry of a molecule using bond hybridisation and VSEPR, where the central atom is sp2 hybridised with 3 sigma bonds. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
52
sp2 Hybridisation, Bent, VSEPR - AP Chemistry
2:03

sp2 Hybridisation, Bent, VSEPR - AP Chemistry

This AP Chemistry video demonstrates how to draw the geometry of a molecule using bond hybridisation and VSEPR, where the central atom is sp2 hybridised with 2 sigma bonds and a lone pair of electrons. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
53
sp3 Hybridisation, Tetrahedral, VSEPR - AP Chemistry
1:23

sp3 Hybridisation, Tetrahedral, VSEPR - AP Chemistry

This AP Chemistry video demonstrates how to draw the geometry of a molecule using bond hybridisation and VSEPR, where the central atom is sp3 hybridised with 4 sigma bonds. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
54
sp3 Hybridisation, Trigonal Pyramidal, VSEPR - AP Chemistry
1:38

sp3 Hybridisation, Trigonal Pyramidal, VSEPR - AP Chemistry

This AP Chemistry video demonstrates how to draw the geometry of a molecule using bond hybridisation and VSEPR, where the central atom is sp3 hybridised with 3 sigma bonds and a lone pair of electrons. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
55
sp3 Hybridisation, Bent, VSEPR - AP Chemistry
1:25

sp3 Hybridisation, Bent, VSEPR - AP Chemistry

This AP Chemistry video demonstrates how to draw the geometry of a molecule using bond hybridisation and VSEPR, where the central atom is sp3 hybridised with 2 sigma bonds and two lone pairs of electrons. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
56
Steric Number, VSEPR, Molecular Geometry - AP Chemistry
1:38

Steric Number, VSEPR, Molecular Geometry - AP Chemistry

This AP Chemistry video demonstrates how to quickly determine the geometry of a molecule or polyatomic ion using the steric number. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
57
Orbital Overlap Diagrams, Bond Formation - AP Chemistry
2:19

Orbital Overlap Diagrams, Bond Formation - AP Chemistry

This AP Chemistry video demonstrates how to draw orbital overlap diagrams, where the overlap between electron orbitals results in sigma and pi bonds. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
58
Structural Isomers, pi Bonds - AP Chemistry
1:29

Structural Isomers, pi Bonds - AP Chemistry

This AP Chemistry video covers structural isomers with pi bonds and explains how to determine the geometry of a large molecule. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
59
Bond Hybridisation, Molecular Geometry, Example - AP Chemistry
2:14

Bond Hybridisation, Molecular Geometry, Example - AP Chemistry

This AP Chemistry video covers a worked example on bond hybridisation and molecular geometry. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
60
Orbital Overlap Diagram, Bonds, Example - AP Chemistry
1:34

Orbital Overlap Diagram, Bonds, Example - AP Chemistry

This AP Chemistry video covers a worked example on orbital overlap diagrams. This video is part of Unit 2 of AP Chemistry on Molecular and Ionic Compound Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
61
Polarity of Molecules - AP Chemistry
1:56

Polarity of Molecules - AP Chemistry

This AP Chemistry video explains how to determine the polarity of a molecular using the polarity of the covalent bonds and symmetry in the molecule's geometry. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
62
Polarity of Molecules, Example - AP Chemistry
0:51

Polarity of Molecules, Example - AP Chemistry

This AP Chemistry video covers a worked example on the polarity of molecules. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
63
Intermolecular Forces, van der Waals forces, Introduction - AP Chemistry
1:09

Intermolecular Forces, van der Waals forces, Introduction - AP Chemistry

This AP Chemistry video provides an introduction to intermolecular forces. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
1 comment
64
London Dispersion Forces, Temporary Fluctuating Dipoles - AP Chemistry
1:35

London Dispersion Forces, Temporary Fluctuating Dipoles - AP Chemistry

This AP Chemistry video explains London Dispersion Forces, which are weak intermolecular interactions that are most prominent in large molecules, and can also occur between non-polar molecules. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
65
Dipole-Induced Dipole Interactions - AP Chemistry
0:55

Dipole-Induced Dipole Interactions - AP Chemistry

This AP Chemistry video explains dipole-induced dipole interactions which are forces between polar and non-polar molecules. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
1 comment
66
Dipole-Dipole Interactions, Hydrogen Bonds - AP Chemistry
1:22

Dipole-Dipole Interactions, Hydrogen Bonds - AP Chemistry

This AP Chemistry video explains dipole-dipole interactions which are forces between polar molecules, and hydrogen bonding, which is a strong type of dipole-dipole interaction between polar molecules. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
1 comment
67
Ion-Dipole Interactions - AP Chemistry
1:10

Ion-Dipole Interactions - AP Chemistry

This AP Chemistry video explains ion-dipole interactions, which is a strong interaction between an ion and polar molecule. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
68
Large Biomolecules, Non-Covalent Interactions - AP Chemistry
1:30

Large Biomolecules, Non-Covalent Interactions - AP Chemistry

This AP Chemistry video explains non-covalent interactions in large biomolecules, which can occur within the same biomolecule and with other molecules. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
69
Vapour Pressure, Boiling Point, Melting Point - AP Chemistry
2:02

Vapour Pressure, Boiling Point, Melting Point - AP Chemistry

This AP Chemistry video explains the main properties of solids and liquids (vapour pressure, boiling point and melting point) and how they are related to the intermolecular forces. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
1 comment
70
Intermolecular Forces, Vapour Pressure, Boiling Point, Examples - AP Chemistry
5:14

Intermolecular Forces, Vapour Pressure, Boiling Point, Examples - AP Chemistry

This AP Chemistry video covers a worked example on intermolecular forces, vapour pressure and boiling point. This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
1 comment
71
Particulate-Level Representations, Chemical Species, Interactions - AP Chemistry
2:13

Particulate-Level Representations, Chemical Species, Interactions - AP Chemistry

This AP Chemistry video explains how particulate-level representations can be used to visualise different chemical species and the interactions between them, which leads to establishing their macroscopic properties (e.g. vapour pressure, boiling point, melting point). This video is part of Unit 3 of AP Chemistry on Intermolecular Forces and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.
1 comment
72
Ionic Solids - Chemistry
1:42

Ionic Solids - Chemistry

This chemistry video covers a tutorial on ionic solids. It explains how the lattice structure of ionic solids and the Coulomb interactions between the ions are used to describe their properties including low vapour pressure, high boiling and melting points, brittleness and poor conductivity in the solid phase. The cations and anions in ionic solids are arranged to minimise repulsion between opposite charges. In the liquid state, the ions are mobile and conduct electricity.
73
Covalent Network Solids - Chemistry
1:59

Covalent Network Solids - Chemistry

This chemistry video covers a tutorial on covalent network solids. It explains how the chemical structures of covalent network solids and their restricted bond angles are used to describe their properties including rigidity, hardness, brittleness and poor conductivity. Several examples of covalent network solids are covered including diamond, graphite and silicon carbide, which are arranged in a tetrahedral or multi-layered configuration.
74
Molecular Solids - Chemistry
2:08

Molecular Solids - Chemistry

This chemistry video covers a tutorial on molecular solids. It explains how the intermolecular interactions, including dipoles and london dispersion forces, and the restricted movement of valence electrons are used to describe the properties of molecular solids, including low melting and sublimation points, and poor conductivity. Several examples of molecular solids are covered including dry ice and ice.
75
Metallic Solids - Chemistry
2:33

Metallic Solids - Chemistry

This chemistry video covers a tutorial on metallic solids. It explains how the lattice structure, which can be represented using a sea of electrons model, and includes delocalised valence electrons, can be used to describe the properties of metallic solids, including malleability, ductility and conductivity of both electricity and heat. An example of an interstitial alloy is provided, being steel, to show how the addition of carbon at the interstitial sites can increase the rigidity while decreasing the ductility of the alloy.
76
Large Biomolecules and Polymers - Chemistry
2:28

Large Biomolecules and Polymers - Chemistry

This chemistry video covers a tutorial on large biomolecules and polymers. It explains how the structure of a large biomolecule leads to stable forms, such as the ring formation of glucose, which is more stable in water than dry glucose. Polymers are also covered, which are composed of a chain of repeating units called monomers.
1 comment
77
Crystalline Vs Amorphous Solids - AP Chemistry
2:15

Crystalline Vs Amorphous Solids - AP Chemistry

This chemistry video covers a tutorial on crystalline and amorphous solids. It explains the difference between the structures of crystalline and amorphous solids and provides examples. For example, metals and ceramics have a densely packed crystalline structure whereas glass has an amorphous structure.
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Liquid Phase, Molar Volume - Chemistry
1:59

Liquid Phase, Molar Volume - Chemistry

This chemistry video covers a tutorial on the liquid phase. It explains how the nature and strength of the intermolecular forces and temperature influence the arrangement and movement of the particles. Also explained is the reason as to why the molar volume of ice is slightly lower than that of water.
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Gas Phase - Chemistry
1:33

Gas Phase - Chemistry

This chemistry video covers a tutorial on the gas phase. It explains how the frequencies of collisions and average spacing between the gas particles are influenced by pressure, volume and temperature. The gas does not have a definite volume due to the weak van der Waals forces between the molecules and the random motion of the gas particles.
1 comment
80
Ideal Gas Law - Chemistry
2:23

Ideal Gas Law - Chemistry

This chemistry video covers a tutorial on the ideal gas law. It explains the relationship between the macroscopic properties of an ideal gas, namely pressure, volume and temperature. The ratio of the pressure, volume and temperature can be constant under certain conditions.
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Dalton's Law, Ideal Gas Mixture - Chemistry
1:07

Dalton's Law, Ideal Gas Mixture - Chemistry

This chemistry video covers a tutorial on the Dalton's law for a mixture of ideal gases. Dalton's law states that the total pressure of the mixture is equal to the sum of the partial pressures of the gas components, which are independent of each other.
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Gay-Lussac's Law, Ideal Gas, Constant Volume - Chemistry
0:55

Gay-Lussac's Law, Ideal Gas, Constant Volume - Chemistry

This chemistry video covers a tutorial on Gay-Lussac's law for an ideal gas. Gay-Lussac's law is a special case of the ideal gas law where the volume of the gas is held constant. In this case, the pressure is proportional to the temperature of the gas.
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Boyle's Law, Ideal Gas, Constant Temperature - Chemistry
1:09

Boyle's Law, Ideal Gas, Constant Temperature - Chemistry

This chemistry video covers a tutorial on Boyle's law for an ideal gas. Boyle's law is a special case of the ideal gas law where the temperature of the gas is held constant. In this case, the pressure is inversely proportional to the volume of the gas.
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Charles' Law, Ideal Gas, Constant Pressure - Chemistry
1:03

Charles' Law, Ideal Gas, Constant Pressure - Chemistry

This chemistry video covers a tutorial on Charles' law for an ideal gas. Charles' law is a special case of the ideal gas law where the pressure of the gas is held constant. In this case, the volume is inversely proportional to the temperature of the gas.
1 comment
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Ideal Gas Law, Dalton's Law, Examples - Chemistry
4:55

Ideal Gas Law, Dalton's Law, Examples - Chemistry

This chemistry video covers a tutorial on the ideal gas law and Dalton's law. Worked examples are covered to reinforce your understanding.
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Kinetic Molecular Theory - Chemistry
2:13

Kinetic Molecular Theory - Chemistry

This chemistry video covers a tutorial on the kinetic molecular theory of ideal gases and the key assumptions, which is what the ideal gas law is based on.
1 comment
87
Maxwell-Boltzmann Distribution - Chemistry
1:48

Maxwell-Boltzmann Distribution - Chemistry

This chemistry video covers a tutorial on the Maxwell-Boltzmann distribution of velocities for an ideal gas or a mixture of ideal gases. The distribution of velocities for two cases are given, the same ideal gas at different temperatures and a mixture of ideal gases at the same temperature.
88
Maxwell-Boltzmann Distribution, Kinetic Molecular Theory, Example - Chemistry
1:21

Maxwell-Boltzmann Distribution, Kinetic Molecular Theory, Example - Chemistry

This chemistry video covers a tutorial on kinetic molecular theory and the Maxwell-Boltzmann distribution of velocities for an ideal gas or a mixture of ideal gases. The distribution of velocities for two cases are given, the same ideal gas at different temperatures and a mixture of ideal gases at the same temperature. A worked example is covered to reinforce your understanding.
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Deviation from Ideal Gas - Chemistry
1:55

Deviation from Ideal Gas - Chemistry

This chemistry video covers a tutorial on the deviation from ideal gas behaviour. The two main conditions where a gas deviates from ideal behaviour are when the volume of the gas particle is not negligible compared to the volume of the gas and when intermolecular forces become significant near condensation conditions.
1 comment
90
Deviation from Ideal Gas Law, Examples - Chemistry
3:18

Deviation from Ideal Gas Law, Examples - Chemistry

This chemistry video covers a tutorial on the deviation from ideal gas behaviour. The two main conditions where a gas deviates from ideal behaviour are when the volume of the gas particle is not negligible compared to the volume of the gas and when intermolecular forces become significant near condensation conditions. Examples are provided to reinforce your understanding.
1 comment
91
Homogeneous Vs Heterogeneous Mixtures, Solutions - Chemistry
2:20

Homogeneous Vs Heterogeneous Mixtures, Solutions - Chemistry

This chemistry video covers a tutorial on homogeneous and heterogeneous mixtures. Homogeneous mixtures are also referred to as solutions. These types of mixtures can be multi-phase, and solids, liquids and gases.
92
Molarity, Solutions - Chemistry
0:50

Molarity, Solutions - Chemistry

This chemistry video covers a tutorial on the molarity or the molar concentration of solutions, which is commonly used in a laboratory. A solute dissolves in a solvent.
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Molarity, Dilution, Solutions, Examples - Chemistry
4:57

Molarity, Dilution, Solutions, Examples - Chemistry

This chemistry video covers a tutorial on the molarity or the molar concentration of solutions, which is commonly used in a laboratory. Examples on molarity and dilution are provided for practice.
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Particulate Models, Solutions - Chemistry
2:25

Particulate Models, Solutions - Chemistry

This chemistry video covers a tutorial on particulate models which are used to represent solutions. 0:00 Intro to particulate representations of solutions 0:10 Example, sodium chloride 1:04 Example, magnesium chloride 1:54 Example, Sodium sulfate
1 comment
Chromatography, Distillation, Separating Solutions and Mixtures - Chemistry
10:17

Chromatography, Distillation, Separating Solutions and Mixtures - Chemistry

This chemistry video covers a tutorial on the methods used for separating solutions and mixtures. These include paper chromatography, thin-layer chromatography, column chromatography and distillation. 0:00 Introduction to separating solutions and mixtures, paper chromatography 2:22 Thin-layer chromatography 4:41 Column chromatography 6:00 Simple Vs fractional distillation 8:23 Worked example on chromatography
1 comment
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Solubility - Chemistry
1:58

Solubility - Chemistry

This chemistry video covers a tutorial on solubility. Polar solutes dissolve in polar solvents, and non-polar solutes dissolve in non-polar solvents.
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Spectroscopy, Electromagnetic Spectrum - Chemistry
1:55

Spectroscopy, Electromagnetic Spectrum - Chemistry

This chemistry video covers a tutorial on spectroscopy and the electromagnetic spectrum. It explains how energy from different parts of the electromagnetic spectrum results in electronic transitions in molecules.
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Photoelectric Effect - AP Chemistry
1:29

Photoelectric Effect - AP Chemistry

This chemistry video covers a tutorial on the photoelectric effect.
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99
Spectrophotometry, Beer Lambert Law - Chemistry
5:58

Spectrophotometry, Beer Lambert Law - Chemistry

This chemistry video covers a tutorial on the spectrophotometry experiment and the Beer-Lambert law. 0:00 Spectrophotometry experiment 1:54 Beer-Lambert law 3:32 Worked example on spectrophotometry and the Beer-Lambert law
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100
Physical Vs Chemical Changes, Intro to Reactions - Chemistry
2:04

Physical Vs Chemical Changes, Intro to Reactions - Chemistry

This chemistry video covers a tutorial that provides an introduction to reactions and explains the difference between physical and chemical changes.
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4.2a Balancing Chemical Equations, Net Ionic Equations - AP Chemistry
4:52

4.2a Balancing Chemical Equations, Net Ionic Equations - AP Chemistry

This chemistry video covers a tutorial on balancing chemical equations and net ionic equations. 0:00 Intro the balancing chemical equations with example 1:13 Worked examples on balancing chemical equations 2:42 Representing reactions using balanced molecular, complete ionic and net ionic equations
2 comments
102
Particulate Models, Reactions - AP Chemistry
1:22

Particulate Models, Reactions - AP Chemistry

This chemistry video covers a tutorial on how to represent reactions using particulate models.
103
Physical and Chemical Changes - Chemistry
1:27

Physical and Chemical Changes - Chemistry

This chemistry video covers a tutorial on how to determine if a process is a physical or chemical change or both.
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104
Stoichiometry, Limiting Reactant, Molarity, Percent Yield - Chemistry
10:43

Stoichiometry, Limiting Reactant, Molarity, Percent Yield - Chemistry

This chemistry video covers a tutorial on how to solve stoichiometry problems involving the ideal gas law, molarity, limiting reactant and percent yield. 0:00 Intro to stoichiometry 1:38 Worked example on finding the number of moles of a reactant 3:03 Worked example on finding the empirical formula 5:13 Worked example on finding the molarity of a solution 6:44 Worked example on finding the limiting reactant 8:41 Worked example on finding the percent yield
3 comments
105
Titration, Introduction - Chemistry
2:18

Titration, Introduction - Chemistry

This chemistry video covers a tutorial that provides an introduction to titration using an acid-base titration as an example.
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106
Types of Chemical Reactions, Oxidation States, Solubility Rules - Chemistry
3:20

Types of Chemical Reactions, Oxidation States, Solubility Rules - Chemistry

This chemistry video covers a tutorial on the different types of chemical reacitons, oxidation states, solubility rules and naming polyatomic ions. 0:00 Types of chemical reactions 2:12 Oxidation states 4:34 Solubility rules 5:57 Naming polyatomic ions

Chromatography, Distillation, Separating Solutions and Mixtures - Chemistry

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38
Science Education separating mixtures chromatography chemistry distillation separating mixtures evaporation distillation separating mixtures distillation chemistry distillation separating mixtures chemistry separating mixtures in chemistry

This chemistry video covers a tutorial on the methods used for separating solutions and mixtures. These include paper chromatography, thin-layer chromatography, column chromatography and distillation.

0:00 Introduction to separating solutions and mixtures, paper chromatography
2:22 Thin-layer chromatography
4:41 Column chromatography
6:00 Simple Vs fractional distillation
8:23 Worked example on chromatography

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