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# How to Calculate Percent Yield in Chemistry

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❶Read this guide if you are asked to balance an equation yourself.

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You determine percent yield with the following formula: Lovely, but what is an actual yield, and what is a theoretical yield? An actual yield is, well, the amount of product actually produced by the reaction in a lab or as told to you in the chemistry problem.

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To determine percent yield, divide the actual yield by the theoretical yield and multiply by For this example, use the equation: 82 grams of silver / 85 grams of silver x = 96 percent. This percentage tells you the efficiency of the chemical reaction, or how good the reaction is at actually producing the desired product.

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Since percent yield is a percentage, you would normally expect to have a percent yield between zero and If your percent yield is greater than , that probably means you calculated or measured something incorrectly. Percent yield calculator to solve for percent yield given actual yield and theoretical yield.