Theoretical Yield Calculator
Calculate the maximum product mass from reactant mass, molar masses, and stoichiometric ratio.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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Enter the mass of your reactant, its molar mass, the molar mass of the desired product, and the product-to-reactant mole ratio from the balanced equation. The calculator converts to moles, applies the ratio, and converts back to grams.
About the Theoretical Yield Calculator
Theoretical yield represents the maximum mass of product obtainable from a reaction, calculated from stoichiometry. It serves as the benchmark for evaluating reaction efficiency through percent yield. Determining theoretical yield requires a balanced equation and the mass of the limiting reagent.
Frequently Asked Questions
What is theoretical yield?
Theoretical yield is the maximum amount of product that could be formed from a given amount of reactant, assuming the reaction goes to completion with no losses. It is calculated using stoichiometry from the balanced equation.
How do I find the mole ratio?
The mole ratio comes from the coefficients in the balanced chemical equation. If the equation is 2A + B -> 3C, and A is your reactant, the product:reactant mole ratio is 3:2 = 1.5.
Why is actual yield always less than theoretical yield?
Reactions rarely go to 100% completion. Side reactions, incomplete mixing, losses during transfer, and purification steps all reduce the actual amount of product obtained.