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how to percent yield chemistry. If you want to find the percent yield of the chemical reaction which is the efficiency of the chemical reaction we are going to take the actual yield which is how much product we actually made and we compare it to the theoretical yield. You determine percent yield of a chemical reaction with the following formula.
List the known quantities and plan the problem. Think about your result. Sometimes its possible for your percent yield to be above 100 percent.
When you divide actual yield by theoretical yield you get a decimal percentage known as the percent yield of a reaction.
To compare the amount of product obtained from a reaction with the amount that should have been obtained they use percent yield. In this video I answer these two questions. Calculating Percent Yield 1. Assume that none of the substances were wasted during the process and no by-products are produced then your percent yield is 100 percent which is almost impossible to achieve.