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The following is a list of chemistry topics typically covered during the first year of high school chemistry or the first semester of college chemistry. Clicking on the topic will bring up a video lesson and accompanying explanation, while choosing “Practice Problems” shares a worksheet with a video showing how to work each of the problems.

Those in blue have been completed, while those in black are still under development.

Legend:   – video lesson,  – typed lesson,  – accompanying worksheet

Introduction to Chemistry

• The Scientific Method  

Numbers & Measurements

• Significant Digits (Significant Figures) & Measurements  
  
  • Practice Problems  
• Significant Digits (Significant Figures) & Rounding  
• Significant Digits (Significant Figures) & Calculations  
  • Practice Problems  
• Scientific Notation  
  • Practice Problems  
• Accuracy and Precision

Units & Unit Analysis

• Unit Analysis (Unit Conversions)  
  • Practice Problems
• Metric System & Conversions  
  • Practice Problems  
• Converting Units to a Power (m², cm³)
  • Practice Problems
• Compound Unit Conversions (miles/gallon, kilometers/hour)  
  • Practice Problems  
• Density
  • Practice Problems
• Percentages
  • Practice Problems

Matter and Energy

• Phases of Matter: Solid, Liquid & Gas
• Elements, Compounds & Mixtures
• Physical & Chemical Properties
• Physical & Chemical Changes
• Temperature – Fahrenheit, Celsius & Kelvin
  • Practice Problems
• Heat & Specific Heat Capacity  
  • Practice Problems I  
  • Practice Problems II

The Atom

• Structure of the Atom – Protons, Electrons & Neutrons 
• Isotopes – Atomic Number & Mass Number 
  • Practice Problems
• Average Atomic Mass Calculations  
  • Practice Problems I  
  • Practice Problems II  
• Ions
• The Periodic Law & The Periodic Table

Molecules & Compounds

• Chemical Formulas
• Elements, Molecules & Compounds
• Monoatomic Ions 
• Polyatomic Ions  
• Identifying Ionic vs. Molecular Compounds
• Formulas of Ionic Compounds
  • Practice Problems  
• Naming Ionic Compounds
  • Practice Problems  
• Names & Formulas of Molecular (Covalent) Compounds
  • Practice Problems  
• Names & Formulas of Acids
• • Practice Problems
• Practice: Formulas of Chemical Compounds (all types)  
• Practice: Naming Chemical Compounds (all types)  
  

The Mole

• The Mole (Avogadro’s Number) 
• Molar Mass  
  • Practice Problems  
• Mole Calculations I (Avogadro’s Number & Molar Mass)
• Mole Ratio from Chemical Formulas
• Mole Calculations II (Avogadro’s Number, Molar Mass & Mole Ratio)
  • Practice Problems  

Chemical Composition

• Percent Composition 
• Empirical & Molecular Formulas 
• Determining Formula from Percent Composition 
  • Practice Problems  

Chemical Reactions

• Writing Chemical Equations 
• Balancing Chemical Equations 
  • Practice Problems  
• Types of Chemical Reactions 
• Double Displacement Reactions (Precipitation Reactions, Solubility) 
  • Practice Problems  
• Acid-Base / Neutralization Reactions 
• Gas Evolution Reactions 
• Molecular, Complete Ionic & Net Ionic Equations 
  • Practice Problems  

Quantities in Chemical Reactions

• Reaction Stoichiometry 
• Limiting Reactants 
  • Practice Problems  
• Percent Yield 
• Enthalpy 

Electrons

• Electromagnetic Radiation
• Models of the Atom
• Electron Configurations
  • Practice Problems
• Condensed Electron Configurations
  • Practice Problems
• Atomic Size / Atomic Radius
• Ionization Energy

Chemical Bonds

• Valence Electrons (Octet Rule)
• Lewis Structures (Resonance Structures)
  • Practice Problems
• Shapes of Molecules (Electron Geometry, Molecular Geometry)
  • Practice Problems
• Electronegativity & Polarity
• Molecular Polarity

Gases

• Kinetic Molecular Theory
• Pressure
• Boyle’s Law
• Charles’s Law
• Combined Gas Law
  • Practice Problems
• Avogadro’s Law
• Ideal Gas Law
  • Practice Problems
• Dalton’s Law
• Molar Volume
• Density of a Gas
• Molar Mass of a Gas
• Gases in Reaction Stoiciometry
  • Practice Problems

Liquids, Solids & Intermolecular Forces

• Changes of State
• Heat of Vaporization
• Heat of Fusion
• Heating Curve
• Intermolecular Forces (Dispersion Forces, Dipole-Dipole Forces, Hydrogen Bonding)
• Solubility and Intermolecular Forces

Solutions

• Mass Percent Concentration
  • Practice Problems
• Parts per Million / Parts per Billion Concentration
  • Practice Problems
• Molarity
  • Practice Problems
• Dilution
  • Practice Problems
• Solution Stoichiometry
  • Practice Problems
• Freezing Point Depression
• Boiling Point Elevation
• Osmosis

Acids & Bases

• Arrhenius Acid-Base Theory
• Brønsted-Lowry Acid-Base Theory
• Conjugate Acids & Bases
• Strengths of Acids & Bases (Strong Acids, Weak Acids, Strong Bases, Weak Bases)
• pH
  • Practice Problems
• pOH
  • Practice Problems
• Acid-Base Titrations
  • Practice Problems

Chemical Equilibrium

• Equilibrium & Equilibrium Constant (K_eq)
  • Practice Problems
• Le Châtelier’s Principle
  • Practice Problems
• Solubility Product Constant (K_sp)
  • Practice Problems
• Molar Solubility
  • Practice Problems
• Activation Energy (Catalysts)

Oxidation & Reduction (Redox)

• Oxidation & Reduction (Redox)
• Oxidation States (Oxidation Numbers)
• Balancing Oxidation-Reduction Reactions (Half-Reaction Method)
  • Practice Problems
• Balancing Oxidation-Reduction Reactions in Basic Solution
  • Practice Problems
• Activity Series (Spontaneous Redox Reactions)
• Electrochemical Cells
• Electrolysis
• Corrosion

Nuclear Chemistry

• Radioactivity
• Types of Radiation
• Nuclear Equations
  • Practice Problems
• Activity & Half-Life
  • Practice Problems
• Nuclear Fission & Fusion