Percentage Yield (AQA GCSE Chemistry): Flashcards

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Percentage Yield
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Percentage yield compares

Actual yield vs theoretical yield

Actual yield

Amount actually obtained from reaction

Theoretical yield

Maximum possible amount from reaction

% yield formula

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

Why reversible reactions < 100% yield

Don't go to completion

How separation reduces yield

Product lost during separation

Why unexpected reactions reduce yield

Reactants react in unexpected ways (e.g. with air)

Actual 6.25g, theoretical 8.5g: % yield?

73.5%

Meaning of 73.5% yield

73.5% of reactants converted to product

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