GCSE Chemistry – Percentage yield
Learning Objectives
-I can calculate the percentage yield of a reaction
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Question 1 of 12
1. Question
What is the definition of percentage yield?
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Question 2 of 12
2. Question
What is the definition of the yield of a reaction?
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Question 3 of 12
3. Question
What is the formula for percentage yield?
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Question 4 of 12
4. Question
Which of the following is a reason why a reaction may not produce a 100% percentage yield?
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Question 5 of 12
5. Question
Which of the following is a reason why a reaction may not produce a 100% percentage yield?
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Question 6 of 12
6. Question
Which of the following is a reason why a reaction may not produce a 100% percentage yield?
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Question 7 of 12
7. Question
Which of the following is a reason why a reaction may not produce a 100% percentage yield?
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Question 8 of 12
8. Question
Which of the following is a reason why a reaction may not produce a 100% percentage yield?
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Question 9 of 12
9. Question
5.4 grams of calcium carbonate is reacted with an excess of hydrochloric acid. 3.015 grams of calcium chloride is obtained. What is the percentage yield of calcium chloride? Leave your answer to one decimal place and use the following equation to help you.
CaCO_3 + 2HCl – > CaCl_2 + H_2CO_3
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Question 10 of 12
10. Question
4.65 grams of sodium is reacted with an excess of water. 2.10 grams of sodium hydroxide is obtained. What is the percentage yield of sodium hydroxide? Leave your answer to two decimal places and use the following equation to help you.
2Na + 2H_2O -> 2NaOH + H_2
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Question 11 of 12
11. Question
0.0345 grams of hydrochloric acid is reacted with 0.05 grams of ethene. 0.0022 grams of ethyl chloride,C_2H_5Cl, is obtained. What is the percentage yield of ethyl chloride, C_2H_5Cl? Leave your answer to one decimal place and use the following equation to help you.
HCl + C_2H_4 – > C_2H_5Cl
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Question 12 of 12
12. Question
0.56 grams of salicylic acid, C_7H_6O_3, is reacted with 0.39 grams of ethanoyl chloride, C_2H_3OCl. 0.02 grams of aspirin is obtained. What is the percentage yield of aspirin, C_9H_8O_4? Leave your answer to one decimal place and use the following equation to help you.
C_7H_6O_3 + C_2H_3OCl -> C_9H_8O_4 + HCl
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