Balancing Chemical Equations
A Grade 10 science worksheet focusing on understanding and balancing chemical equations, and identifying reaction types.
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Standards
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Balancing Chemical Equations Worksheet
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Date:
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Read each question carefully and provide the best answer. Show all your work for calculations.
1. A chemical equation represents a chemical using symbols and formulas.
2. The substances on the left side of a chemical equation are called .
3. The Law of of Mass states that matter cannot be created or destroyed in a chemical reaction.
4. A in a chemical equation indicates the number of moles of a reactant or product.
1. Which of the following is NOT a type of chemical reaction?
Synthesis
Decomposition
Neutralization
Precipitation
2. In the reaction 2H₂ + O₂ → 2H₂O, what is the coefficient for oxygen?
1
2
3
4
Balance the following chemical equations:
1. N₂ + H₂ → NH₃
2. KClO₃ → KCl + O₂
3. C₃H₈ + O₂ → CO₂ + H₂O
Match each chemical reaction with its type.
1. A + B → AB
a. Decomposition
2. AB → A + B
b. Single Replacement
3. A + BC → AC + B
c. Synthesis
4. AB + CD → AD + CB
d. Double Replacement
1. Coefficients in a balanced chemical equation can be fractions.
True
False
2. A subscript in a chemical formula can be changed to balance an equation.
True
False
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