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Ch.5 Classification & Balancing of Chemical ReactionsWorksheetSee all chapters
All Chapters
Ch.1 Matter and Measurements
Ch.2 Atoms and the Periodic Table
Ch.3 Ionic Compounds
Ch.4 Molecular Compounds
Ch.5 Classification & Balancing of Chemical Reactions
Ch.6 Chemical Reactions & Quantities
Ch.7 Energy, Rate and Equilibrium
Ch.8 Gases, Liquids and Solids
Ch.9 Solutions
Ch.10 Acids and Bases
Ch.11 Nuclear Chemistry
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Chemical Reaction: Chemical Change
Law of Conservation of Mass
Balancing Chemical Equations (Simplified)
Solubility Rules
Molecular Equations
Types of Chemical Reactions
Complete Ionic Equations
Calculate Oxidation Numbers
Redox Reactions
Spontaneous Redox Reactions
Balancing Redox Reactions: Acidic Solutions
Balancing Redox Reactions: Basic Solutions
Balancing Redox Reactions (Simplified)
Galvanic Cell (Simplified)

"In a chemical reaction, no matter is created or destroyed, but instead changes form."

Lavoisier's Conservation of Mass

Concept #1: Law of Conservation of Mass

According to Lavoisier, all reactants are completely converted into products.

Example #1: How many grams of water vapor will form if 25.0 grams of hydrogen gas mixes with 12.0 grams of oxygen gas?

Practice: Following the Law of Conservation of Mass, predict the minimum amount of nitrogen that will react with 50.0 grams of hydrogen to produce 92.5 grams of ammonia.

Nitrogen + Hydrogen → Ammonia

Practice: Predict the amount of oxygen gas that will remain after the reaction of 112.6 grams of calcium with 24.0 grams of oxygen.