Theoretical Yield Worksheet
Understand and calculate theoretical yield in chemical reactions, including limiting reactants and percent yield.
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Theoretical Yield Worksheet
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Read each question carefully and provide the best answer. Show all your work for calculation problems.
1. What is theoretical yield?
The amount of product actually obtained from a reaction.
The maximum amount of product that can be formed from given amounts of reactants.
The percentage ratio of actual yield to theoretical yield.
The amount of reactant consumed in a reaction.
2. Which factor can cause the actual yield to be less than the theoretical yield?
Impurities in reactants
Side reactions
Incomplete reactions
All of the above
3. The reactant that runs out first in a chemical reaction is called the reactant.
4. The formula for percent yield is (actual yield / ) x 100%.
5. Consider the reaction: 2H₂ + O₂ → 2H₂O. If you start with 4.0 g of H₂ and excess O₂, what is the theoretical yield of H₂O in grams? (Molar mass of H₂ = 2.02 g/mol, O₂ = 32.00 g/mol, H₂O = 18.02 g/mol)
6. In a different experiment, the theoretical yield of product was calculated to be 10.0 grams. If the actual yield obtained was 8.5 grams, calculate the percent yield.
7. The actual yield can sometimes be greater than the theoretical yield.
True
False
8. Explain why chemists are interested in both theoretical yield and actual yield, and what information the percent yield provides.