Nathan Oldridge
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      Free Chemistry Help Videos

      There are more, but I'm too busy creating them to keep up this directory.
      For the most recent ones, go to my YouTube Channel


      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