Reaction yields (AQA GCSE Chemistry): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the yield of a chemical reaction?
What is the yield of a chemical reaction?
The amount of product obtained
What is the maximum theoretical yield based on?
What is the maximum theoretical yield based on?
Balanced equation and masses
Which rule about atoms is fundamental to yield calculations?
Which rule about atoms is fundamental to yield calculations?
No atoms are gained or lost
How does actual yield compare to theoretical yield?
How does actual yield compare to theoretical yield?
Nearly always less
Why might a reversible reaction give a lower actual yield?
Why might a reversible reaction give a lower actual yield?
Product changes back into reactants
How do side reactions affect the actual yield of the desired product?
How do side reactions affect the actual yield of the desired product?
Reactants make other unwanted products
Which is NOT a reason for getting less than the theoretical yield?
Which is NOT a reason for getting less than the theoretical yield?
Atoms are lost in the reaction
What is the formula for percentage yield?
What is the formula for percentage yield?
Theoretical yield is 1.0 g, actual yield is 0.8 g. What is the percentage yield?
Theoretical yield is 1.0 g, actual yield is 0.8 g. What is the percentage yield?
80%
Expected yield is 1.2 g, actual yield is 0.9 g. Calculate the percentage yield.
Expected yield is 1.2 g, actual yield is 0.9 g. Calculate the percentage yield.
75%
What does a percentage yield of 100% mean?
What does a percentage yield of 100% mean?
All expected product was made
What percentage yield do industrial processes typically aim for to be economically viable?
What percentage yield do industrial processes typically aim for to be economically viable?
Above 70-80%