Balanced Chemical Equations Worksheet
Grade 12 Chemistry worksheet focusing on balancing chemical equations, understanding stoichiometry, and identifying reaction types.
Includes
Standards
Topics
Balanced Chemical Equations
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Carefully read each question and provide the most accurate answer. Show all your work for calculations. Remember to balance all chemical equations.
1. What principle is upheld when balancing a chemical equation?
Law of Conservation of Energy
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
2. In the reaction 2H₂ + O₂ → 2H₂O, the coefficients represent the:
Number of atoms
Number of molecules
Molar ratios
Both b and c
3. The numbers placed in front of chemical formulas in an equation are called .
4. A chemical equation is considered when the number of atoms for each element is the same on both the reactant and product sides.
5. Balance the following chemical equation:
Fe + O₂ → Fe₂O₃
6. Balance the following chemical equation:
C₆H₁₂O₆ + O₂ → CO₂ + H₂O
7. Subscripts in a chemical formula can be changed to balance an equation.
True
False
8. The sum of the masses of the reactants always equals the sum of the masses of the products in a balanced chemical equation.
True
False
9. Explain why balancing chemical equations is a crucial step before performing stoichiometric calculations.