How to Calculate Percent Yield
What is Percent Yield?
Percent yield compares the actual amount of product obtained in a reaction to the theoretical maximum (calculated from stoichiometry). It reflects efficiency and accounts for side reactions, incomplete reactions, and purification losses.
Step-by-Step Guide
- 1Calculate theoretical yield from stoichiometry using limiting reagent
- 2Weigh or measure actual product obtained
- 3Percent yield = (Actual yield / Theoretical yield) × 100%
Worked Examples
Input
Theoretical yield 25g · Actual product 18g
Result
Percent yield = 72%
18/25×100=72%
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