Chemistry / Unit 3 Chem 0486 short lesson, about 20 seconds
Percent Yield
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The idea
Percent yield is the actual yield obtained from a reaction divided by its theoretical yield, expressed as a percentage.
In practice
A reaction with a theoretical yield of 50.0 g that actually produces 42.5 g has a percent yield of 85.0%.
Where people slip
A percent yield above 100% signals a measurement or purity problem, such as leftover solvent, not a reaction that beat its own ceiling.
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