How to use (3 steps)
- Enter the balanced coefficients and labels for each reactant and the product.
- Provide each reactant as mass or moles plus molar mass when needed.
- Tap Compute and the Results card below will show the limiting reactant, theoretical yield, remaining amounts, and percent yield.
The page preloads and solves an example (2 H2 + O2 → 2 H2O). When you edit inputs, the form and results card update right away.
Inputs
Results
Reactant amounts
Product
If no actual yield is entered, the product’s actual columns and percent yield show “—”.
How it's calculated
FAQ
What is a limiting reactant?
The reaction consumes the limiting reactant first as it goes to completion. This reactant caps product formation and sets the theoretical yield.
Does this tool balance the equation for me?
No. Balance the reaction first and enter the stoichiometric coefficients ν₁, ν₂, and νₚ. This calculator assumes the coefficients are already correct.
Should I enter mass or moles?
Most problems start with masses, then convert to moles using molar mass. This tool accepts mass or moles. Enter molar mass whenever you provide mass values.
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