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Limiting Reagent & Percentage yield. The substance in a reaction which causes the reaction be over is the limiting reagent . The reagent which is not the limiting reagent (more than required for the reaction to complete) is called excess .
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The substance in a reaction which causes the reaction be over is the limiting reagent. • The reagent which is not the limiting reagent (more than required for the reaction to complete) is called excess. • The product amounts depend on the limiting reagent and not the one in excess.
Percentage yield • Percentage yield is : • Actual yield x 100 Theoretical yield • Actual yield is the amount really produced in an experiment/production plant • Theoretical yield is the amount obtained when we do calculation or the amount expected to be produced. • In an experiment, actual yield is always smaller than theoretical yield.