Mols reagente limitante
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The limiting reagent mols calculator identifies which reactant will be fully consumed in a chemical reaction, determining the maximum product yield. It uses the formula min(n_A/a, n_B/b), where n_A and n_B are reactant mols and a, b are their stoichiometric coefficients. The smallest value indicates the limiting reagent.
This tool is vital for stoichiometry calculations in labs or chemical industries. For example, in a reaction between H2 and O2 to form H2O, precise proportion calculations are needed to avoid material waste. The calculator streamlines this process, reducing manual errors.
For accurate results, ensure correct stoichiometric coefficients from a balanced equation are input. Incorrect coefficients may misidentify the limiting reagent. Also, verify the units of mols (typically mol/g or mol/L) before using the tool.
Frequently asked questions
What happens if stoichiometric coefficients are entered incorrectly?
Incorrect coefficients change the calculation ratio, leading to wrong identification of the limiting reagent.
Why is the smallest calculated value the limiting reagent?
The smallest value represents the reactant that depletes first, restricting product formation according to the balanced reaction proportion.
How to input data for reactions with more than two reactants?
The calculator supports multiple reactants. Add each (n and coefficient) pair in the order of the chemical equation.
Do I need to convert units before using the calculator?
Yes. Ensure all mol values are in the same unit (e.g., mol/g or mol/L) to avoid inconsistent results.