Free Chemistry Help Videos

There are more, but I'm too busy creating them to keep up this directory.
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Lewis Structures
How to Draw Lewis Structures (with Example)
Lewis Structures for Acids
Advanced Lewis Structures: Resonance
Lewis Structure of Sulfate (SO4 2-)

Bohr-Rutherford Diagrams
Bohr-Rutherford Diagram of Germanium (Advanced)
Bohr-Rutherford Diagram of Oxygen
Bohr-Rutherford Diagram of Potassium
Bohr-Rutherford Diagram of Phosphorous

Basics of Chemistry
What's in an Atom?  Protons, Neutrons, Electrons
Is it an ionic, covalent or polar covalent bond?
How to Count Significant Figures
Significant Figures when Adding / Subtracting
Significant Figures when Multiplying / Dividing

Stoichiometry: Counting Atoms and Molecules
How to Calculate Grams from Moles (Moles to Mass)
Theoretical Yield
Calculating Moles from Grams (Mass to Moles)
How to Calculate Molar MassLimiting Reagent - How To
Limiting Reagents - Example Problem
Limiting Reagents - How To + Example
Calculating Percent Composition (Easy Example)
Calculating Percent Composition (Harder Example)
Convert Number of Molecules to Number of Moles
Convert Number of Moles to Number of Molecules
Equilibrium
How to Write an Equilibrium Expression

Organic Chemistry - Hybridization
What is the hybridization of each atom in this molecule?

Quantum Chemistry
What are the four quantum numbers?
Why do the Four Quantum Numbers matter?
Pauli Exclusion Principle, Aufbau Principle, Hund's Rule
Wavelength --> Frequency
Frequency --> Wavelength
Energy --> Wavelength
Energy --> Frequency
Wavelength --> Energy
Frequency --> Energy

pH and Acidity
Calculate pH of a Weak Acid
Calculate the pH of a Strong Base
Calculate pH of a Strong Acid
Example Calculation: pH of a Weak Acid