What Is The Percent Yeild

Computing Percent Yield

December 5, 2021

Core Concepts

In this tutorial, yous volition learn what percent yield is and how to calculate information technology. In addition, you volition walk through an example calculation.

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What is Percent Yield?

When performing an experiment, at that place is a maximum yield you can obtain if at that place are perfect reaction weather condition; this is the theoretical yield. Nonetheless, fifty-fifty if you follow an experiment correctly, information technology is likely that you lot will non have a perfect yield of the product; the amount of product you terminate up with is your actual yield.

The per centum of the theoretical yield y'all obtained in your experiment is the percentage yield. Let'southward acquire how to summate information technology beneath!

How to Summate Percent Yield

You tin can use the equation below to summate your percent yield from an experiment:

Calculating Theoretical Yield

Get-go, yous should summate the theoretical yield of your experiment; usually, this will involve stoichiometric calculations. By first looking at the chemical equation and data given, you can get an thought of what is reacting and how the product is forming.

Since no more production can be formed one time the limiting reagent runs out, the adjacent stride is to place the limiting reagent.

You lot tin then use dimensional analysis to see how much product can exist formed based on the amount of limiting reagent that is given. This is the theoretical yield of your experiment.

Calculating Actual Yield

If yous are physically doing an experiment, your actual yield volition exist the amount of production you weigh out on your residual. If you are doing a word problem, the actual yield may be given within the trouble.

Percent Yield Equation

The last step, once you have both theoretical and bodily yield, is plugging the numbers into the equation. Dividing the actual by the theoretical gives you the fraction of product you lot made. Multiplying that by 100 gives you the percentage yield.

Calculating Percent Yield Example

Now that nosotros know the steps to calculate percent yield, allow's walk through an case:

Use the balanced chemical reaction beneath. If 40.00 chiliad of Acetylene (C₂H₂) and 65.00 thou of Oxygen are used, and 25.00 g of h2o are produced, what is the per centum yield?

Offset step is to discover limiting reagent & theoretical yield of water:

Using dimensional analysis on both reagents, acetylene is found to produce a lower amount of product than oxygen; because of this acetylene is our limiting reagent.

27.67g is our theoretical yield. The concluding step is to plug our numbers into the percentage yield equation.