Percent Yield Worksheet
A Grade 10 Chemistry worksheet covering percent yield calculations, theoretical yield, actual yield, and factors affecting yield.
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Percent Yield Worksheet
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Read each question carefully and provide clear, concise answers. Show all your work for calculation problems.
1. Which of the following best defines theoretical yield?
The amount of product actually obtained from a reaction.
The maximum amount of product that can be formed from the given amounts of reactants.
The percentage of product obtained compared to the theoretical amount.
The amount of reactant consumed in a reaction.
2. Why is the actual yield almost always less than the theoretical yield?
Reactants are always impure.
Some product is lost during transfer or purification.
The reaction proceeds too quickly.
The limiting reactant is always consumed completely.
3. The formula for calculating percent yield is ( ) / ( ) x 100%.
4. Side reactions can lead to a (higher/lower) actual yield.
5. In a chemical reaction, 4.0 grams of product were theoretically expected, but only 3.2 grams were actually collected. Calculate the percent yield for this reaction.
6. A percent yield greater than 100% is impossible under normal laboratory conditions.
True
False
Match each term on the left with its definition on the right.
7. Actual Yield
a. The amount of product calculated from stoichiometry.
8. Theoretical Yield
b. The amount of product experimentally obtained.
9. Percent Yield
c. The ratio of actual yield to theoretical yield, expressed as a percentage.
10. Explain two common reasons why the actual yield in a chemical reaction might be less than the theoretical yield. Provide an example for each reason.
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