Stoichiometric Calculations Worksheet
A Grade 12 Chemistry worksheet focusing on stoichiometric calculations, including mole-to-mole, mass-to-mass, and limiting reactant problems.
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Standards
Topics
Stoichiometric Calculations
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Read each question carefully and show all your work. Use appropriate units and significant figures in your final answers. Refer to the periodic table for atomic masses.
Mole-to-Mole Calculations
1. Consider the balanced chemical equation: 2H₂(g) + O₂(g) → 2H₂O(l) If 4.0 moles of H₂ react completely, how many moles of H₂O are produced?
2. For the reaction: N₂(g) + 3H₂(g) → 2NH₃(g) How many moles of N₂ are required to produce 10.0 moles of NH₃?
Mass-to-Mass Calculations
3. The combustion of propane (C₃H₈) is represented by the equation: C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(g) If 22.0 g of propane are burned, what mass of carbon dioxide is produced?
4. In the reaction 2KClO₃(s) → 2KCl(s) + 3O₂(g), how many grams of oxygen can be produced from 50.0 g of KClO₃?
Limiting Reactant
5. Given the reaction: 2Al(s) + 3Cl₂(g) → 2AlCl₃(s) If 54.0 g of aluminum reacts with 71.0 g of chlorine gas, identify the limiting reactant.
6. Using the information from question 5, calculate the theoretical yield (in grams) of aluminum chloride (AlCl₃).
True/False
7. The coefficients in a balanced chemical equation represent the mole ratio of reactants and products.
True
False
8. The limiting reactant is the reactant that is completely consumed in a chemical reaction.
True
False
Fill-in-the-Blanks
9. Stoichiometry is the study of the relationships between reactants and products in a chemical reaction.
10. The actual yield of a reaction is usually than the theoretical yield.