Percentage yield (Edexcel GCSE Chemistry Combined Science): Quizzes

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3.3.1 Percentage Yield
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What does percentage yield measure in a chemical reaction?

How much reactant becomes product

What is the 'actual yield' in a chemical reaction?

The amount you actually get

What is the 'theoretical yield'?

The maximum amount you could get

Why don't reversible reactions give 100% yield?

They don't go all the way to completion

How can product be lost during a reaction?

During separation from the mixture

What is an example of reactants reacting in unexpected ways?

Reacting with oxygen in the air

What is the formula for percentage yield?

ActualTheoretical×100\frac{\text{Actual}}{\text{Theoretical}} \times 100

Calculate percentage yield: actual = 44 g, theoretical = 88 g.

50%

What does a 73.5% yield mean?

73.5% of reactants became product

If actual yield is 6.256.25 g and theoretical is 8.58.5 g, what is the percentage yield?

73.5%

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