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Percent Yeild

In doing stoichiometry calculations, we assume things do not go wrong (there is no error). In real terms this assumption is unrealistic. No reaction is going to proceed perfectly. When an equation is used to calculate the amount of product that will form in a reaction, then the value obtained is called the theoretical yield.

By contrast the amount of product that forms when a reaction is carried out in a laboratory is called the actual yield. The percent yield therefore is a ratio of actual yield to the percent yield. The percent yield is therefore a ratio of the actual yield to the percent yield.

Percent yield = (Actual yield/Theoretical yield) x 100

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