Grade 9 Chemistry: Percentage Yield
This worksheet covers the fundamental concepts of percentage yield in chemical reactions for Grade 9 science students.
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Grade 9 Chemistry: Percentage Yield
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Read each question carefully and answer to the best of your ability. Show all your calculations where necessary.
1. What is the formula for calculating percentage yield?
(Actual Yield / Theoretical Yield) x 100%
(Theoretical Yield / Actual Yield) x 100%
(Actual Yield + Theoretical Yield) x 100%
(Theoretical Yield - Actual Yield) x 100%
2. What is the theoretical yield in a chemical reaction?
The amount of product actually obtained.
The maximum amount of product that can be formed from the given reactants.
The amount of reactant consumed in the reaction.
The amount of product lost during purification.
3. The is the amount of product actually obtained from a chemical reaction.
4. A percentage yield of less than 100% indicates that .
5. It is possible to achieve a percentage yield greater than 100% in a chemical reaction.
True
False
6. Impurities in reactants can lead to a lower percentage yield.
True
False
7. In an experiment, a student calculates the theoretical yield of a product to be 15.0 grams. After conducting the reaction, they obtain 12.5 grams of the product. Calculate the percentage yield.
8. List two reasons why the actual yield of a chemical reaction might be less than the theoretical yield.