Theoretical and Percent Yield Calculator
Compares what a reaction should give with what you collected.
Percent yield
— %
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Theoretical yield —
Shortfall —
Reading this —
The formula
theoretical yield = moles of limiting reactant × (product coefficient ÷ its coefficient) × product molar mass percent yield = actual ÷ theoretical × 100
Theoretical yield is the most a reaction could give. Percent yield says how close you came.
What to watch out for
If you are unsure which reactant limits, find that first with the limiting reactant calculator.
Frequently Asked Questions
What is the theoretical yield of carbon dioxide from 10 g of calcium carbonate?
4.397 g. If you collect 3.9 g, the percent yield is 88.7%.
What is the difference between actual and theoretical yield?
Theoretical yield is calculated from the equation. Actual yield is what you weigh at the end.