Excess Reactant Stoichiometry Worksheet
A Grade 11 Chemistry worksheet focusing on identifying limiting and excess reactants, calculating theoretical yield, and determining the amount of excess reactant remaining.
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Excess Reactant Stoichiometry Worksheet
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Read each question carefully and provide detailed answers. Show all your calculations and units.
1. In a chemical reaction, what is the difference between a limiting reactant and an excess reactant?
2. The reactant that determines the maximum amount of product that can be formed is called the reactant.
3. The reactant that is left over after the reaction has gone to completion is called the reactant.
4. Consider the reaction: 2H₂ (g) + O₂ (g) → 2H₂O (l). If you have 4 moles of H₂ and 3 moles of O₂, which is the limiting reactant?
H₂
O₂
H₂O
Neither
5. Given the reaction: 2Al (s) + 3Cl₂ (g) → 2AlCl₃ (s)
If 10.0 g of aluminum (Al) reacts with 15.0 g of chlorine gas (Cl₂):
a. Determine the limiting reactant.
b. Calculate the theoretical yield of aluminum chloride (AlCl₃) in grams.
c. Calculate the mass (in grams) of the excess reactant remaining after the reaction is complete.
6. The theoretical yield of a reaction is always determined by the excess reactant.
True
False
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