Chemistry archive
Chemistry is the study of matter and the changes it undergoes.
10 units243 videos34 hours
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Unit 1: Atoms, compounds, and ions
Introduction to the atom
History of atomic structure
Quantum numbers and orbitals
Electron configurations
Shells, subshells, and orbitals ✓ Check-ins9:41
Introduction to electron configurations ✓ Check-ins5:08
Noble gas configuration ✓ Check-ins6:47
Electron configurations for the first period ✓ Check-ins6:22
Electron configurations for the second period ✓ Check-ins12:12
Electron configurations for the third and fourth periods ✓ Check-ins13:08
Electron configurations of the 3d transition metals ✓ Check-ins12:33
Paramagnetism and diamagnetism ✓ Check-ins8:05
The Aufbau principle ✓ Check-ins7:53
Valence electrons ✓ Check-ins5:11
Valence electrons and ionic compounds ✓ Check-ins7:55
Introduction to photoelectron spectroscopy ✓ Check-ins8:24
Introduction to the periodic table
Periodic table trends
Atomic radius trends on periodic table ✓ Check-ins9:40
Atomic and ionic radii ✓ Check-ins11:26
Mini-video on ion size ✓ Check-ins3:04
Ionization energy trends ✓ Check-ins10:02
Ionization energy: period trend ✓ Check-ins10:03
First and second ionization energy ✓ Check-ins7:35
Electron affinity: period trend ✓ Check-ins13:06
Electronegativity ✓ Check-ins9:54
Electronegativity and bonding ✓ Check-ins11:39
Metallic nature ✓ Check-ins9:28
Periodic trends and Coulomb's law ✓ Check-ins10:43
Worked example: Identifying an element from successive ionization energies ✓ Check-ins2:31
Ionization energy: group trend ✓ Check-ins10:19
Names and formulas of ionic compounds
Unit 2: Chemical bonds
Types of chemical bonds
Bond energy
Solids
Dot structures and molecular geometry
Drawing dot structures ✓ Check-ins14:42
Drawing Lewis diagrams ✓ Check-ins7:08
Worked example: Lewis diagram of formaldehyde (CH₂O) ✓ Check-ins6:08
Worked example: Lewis diagram of the cyanide ion (CN⁻) ✓ Check-ins4:28
Worked example: Lewis diagram of xenon difluoride (XeF₂) ✓ Check-ins3:11
Exceptions to the octet rule ✓ Check-ins7:10
Resonance ✓ Check-ins7:24
Resonance and dot structures ✓ Check-ins6:15
Formal charge ✓ Check-ins7:03
Formal charge and dot structures ✓ Check-ins11:30
Worked example: Using formal charges to evaluate nonequivalent resonance structures ✓ Check-ins8:02
VSEPR for 2 electron clouds ✓ Check-ins8:04
VSEPR for 3 electron clouds ✓ Check-ins12:33
More on the dot structure for sulfur dioxide ✓ Check-ins4:28
VSEPR for 4 electron clouds ✓ Check-ins10:05
VSEPR for 5 electron clouds (part 1) ✓ Check-ins14:58
VSEPR for 5 electron clouds (part 2) ✓ Check-ins10:48
VSEPR for 6 electron clouds ✓ Check-ins12:29
Molecular polarity ✓ Check-ins9:22
2015 AP Chemistry free response 2d and e ✓ Check-ins6:20
Unit 3: Chemical reactions and stoichiometry
Balancing chemical equations
Chemical reactions introduction ✓ Check-ins9:13
Balancing chemical equations ✓ Check-ins5:04
Balancing more complex chemical equations ✓ Check-ins4:37
Visually understanding balancing chemical equations ✓ Check-ins4:37
Balancing another combustion reaction ✓ Check-ins4:58
Balancing chemical equation with substitution ✓ Check-ins4:12
Stoichiometry
Molecular composition
Unit 4: More about chemical reactions
Representations of reactions
Physical and chemical changes
Unit 5: Gases and kinetic molecular theory
Ideal gas equation
The ideal gas law (PV = nRT) ✓ Check-ins6:19
Worked example: Using the ideal gas law to calculate number of moles ✓ Check-ins7:17
Worked example: Using the ideal gas law to calculate a change in volume ✓ Check-ins6:32
Gas mixtures and partial pressures ✓ Check-ins6:23
Worked example: Calculating partial pressures ✓ Check-ins8:03
Worked example: Vapor pressure and the ideal gas law ✓ Check-ins16:02
Kinetic molecular theory
Unit 6: States of matter and intermolecular forces
States of matter
States of matter ✓ Check-ins19:24
States of matter follow-up ✓ Check-ins8:45
Specific heat and latent heat of fusion and vaporization ✓ Check-ins14:57
Specific heat, heat of fusion and vaporization example ✓ Check-ins14:49
Chilling water problem ✓ Check-ins11:23
Change of state example ✓ Check-ins7:38
Vapor pressure ✓ Check-ins18:04
Phase diagrams ✓ Check-ins12:36
Representing solids, liquids, and gases using particulate models ✓ Check-ins4:51
Crystalline and amorphous polymers ✓ Check-ins4:42
Representing alloys using particulate models ✓ Check-ins6:30
Introduction to intermolecular forces
London dispersion forces ✓ Check-ins9:38
Dipole–dipole forces ✓ Check-ins6:46
Hydrogen bonding ✓ Check-ins6:39
Ion–dipole forces ✓ Check-ins4:40
Intermolecular forces and vapor pressure ✓ Check-ins6:04
Solubility and intermolecular forces ✓ Check-ins4:23
Surface tension ✓ Check-ins4:31
Capillary action and why we see a meniscus ✓ Check-ins8:26
Boiling points of organic compounds ✓ Check-ins11:07
Boiling point comparison: AP Chemistry multiple choice ✓ Check-ins6:19
Solubility of organic compounds ✓ Check-ins12:21
Mixtures and solutions
Unit 7: Chemical equilibrium
Unit 8: Acids, bases, and solutions
Acids, bases, and pH
Acid-base equilibria
Buffer solutions
Introduction to buffers ✓ Check-ins6:20
Properties of buffers ✓ Check-ins6:59
Henderson–Hasselbalch equation ✓ Check-ins7:34
Common ion effect and buffers ✓ Check-ins13:19
Buffer solution pH calculations ✓ Check-ins11:39
Methods for preparing buffers ✓ Check-ins10:26
pH and pKa relationship for buffers ✓ Check-ins7:50
Buffer capacity ✓ Check-ins10:44
Titrations
Acid–base titrations ✓ Check-ins8:50
Worked example: Determining solute concentration by acid–base titration ✓ Check-ins7:50
Titration of a strong acid with a strong base ✓ Check-ins10:12
Titration of a strong acid with a strong base (continued) ✓ Check-ins10:17
Titration of a weak acid with a strong base ✓ Check-ins14:27
Titration of a weak acid with a strong base (continued) ✓ Check-ins15:13
Titration of a weak base with a strong acid ✓ Check-ins14:58
Titration of a weak base with a strong acid (continued) ✓ Check-ins14:48
Titration curves and acid-base indicators ✓ Check-ins7:10
Redox titrations ✓ Check-ins7:58
Solubility equilibria
Dissolution and precipitation ✓ Check-ins10:00
Common polyatomic ions ✓ Check-ins5:48
Introduction to solubility equilibria ✓ Check-ins8:17
Worked example: Calculating solubility from Kₛₚ ✓ Check-ins4:52
2015 AP Chemistry free response 4 ✓ Check-ins9:20
The common-ion effect ✓ Check-ins10:08
pH and solubility ✓ Check-ins5:14
Solubility and complex ion formation ✓ Check-ins14:50
Unit 9: Redox reactions and electrochemistry
Oxidation-reduction reactions
Oxidation and reduction ✓ Check-ins11:04
Oxidation state trends in periodic table ✓ Check-ins8:38
Practice determining oxidation states ✓ Check-ins4:27
Unusual oxygen oxidation states ✓ Check-ins4:15
Oxidizing and reducing agents ✓ Check-ins8:30
Disproportionation ✓ Check-ins5:03
Worked example: Balancing a simple redox equation ✓ Check-ins7:11
Worked example: Balancing a redox equation in acidic solution ✓ Check-ins12:04
Worked example: Balancing a redox equation in basic solution ✓ Check-ins14:02- Redox titrations ✓ Check-ins7:58
Galvanic cells
Redox reaction from dissolving zinc in copper sulfate ✓ Check-ins5:01
Introduction to galvanic/voltaic cells ✓ Check-ins6:00
Electrodes and voltage of Galvanic cell ✓ Check-ins4:33
Shorthand notation for galvanic/voltaic cells ✓ Check-ins7:17
Lead storage battery ✓ Check-ins9:06
Nickel-cadmium battery ✓ Check-ins11:07
Standard cell potentials
Electrochemistry, thermodynamics, and equilibrium
Cell potentials under nonstandard conditions
Electrolytic cells and electrolysis
Unit 10: Kinetics
Reaction rates and rate laws
Introduction to kinetics ✓ Check-ins15:27
Introduction to reaction rates ✓ Check-ins9:14
Factors affecting reaction rates ✓ Check-ins5:29
Rate law and reaction order ✓ Check-ins10:39
Units of the rate constant ✓ Check-ins5:09
Worked example: Determining a rate law using initial rates data ✓ Check-ins12:28
Relationship between reaction concentrations and time
First-order reactions ✓ Check-ins7:44
First-order reaction (with calculus) ✓ Check-ins7:14
Plotting data for a first-order reaction ✓ Check-ins9:21
Half-life of a first-order reaction ✓ Check-ins8:16
Worked example: Using the first-order integrated rate law and half-life equations ✓ Check-ins10:20
Second-order reactions ✓ Check-ins7:43
Second-order reaction (with calculus) ✓ Check-ins7:14
Half-life of a second-order reaction ✓ Check-ins7:09
Zero-order reactions ✓ Check-ins4:42
Zero-order reaction (with calculus) ✓ Check-ins9:53
Kinetics of radioactive decay ✓ Check-ins7:53
Arrhenius equation and reaction mechanisms
Collision theory ✓ Check-ins8:48
The Arrhenius equation ✓ Check-ins9:24
Forms of the Arrhenius equation ✓ Check-ins6:41
Using the Arrhenius equation ✓ Check-ins11:06
Collision theory and the Maxwell–Boltzmann distribution ✓ Check-ins7:28
Elementary reactions ✓ Check-ins5:35
Reaction mechanism and rate law ✓ Check-ins8:42
The pre-equilibrium approximation ✓ Check-ins7:23
Multistep reaction energy profiles ✓ Check-ins7:47
Catalysts ✓ Check-ins7:30
Types of catalysts ✓ Check-ins4:59
Spectroscopy
Introduction to spectroscopy ✓ Check-ins4:54
Electronic transitions and energy ✓ Check-ins7:52
Worked example: Calculating the maximum wavelength capable of ionization ✓ Check-ins6:20
Spectrophotometry and the Beer–Lambert Law ✓ Check-ins10:23
Worked example: Calculating concentration using the Beer–Lambert law ✓ Check-ins3:48
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