Limiting Reagent Calculator
Which of two reactants limits the product amount? Enter the stated values to calculate this model.
Reference calculation or estimate for example inputs; assumptions and limitations apply.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| First reactant amount (mol) | Enter first reactant amount in mol; use the same basis as the other measurements. |
| First coefficient (1) | Enter first coefficient in 1; use the same basis as the other measurements. |
| Second reactant amount (mol) | Enter second reactant amount in mol; use the same basis as the other measurements. |
| Second coefficient (1) | Enter second coefficient in 1; use the same basis as the other measurements. |
| Product coefficient (1) | Enter product coefficient in 1; use the same basis as the other measurements. |
Understanding your result
The result is a scientific reference calculation under the model assumptions on this page. It does not assess hazards, chemical compatibility, purity, solubility, equipment limits or clinical meaning.
Common mistakes
- Using solvent volume in place of final solution volume, or mass concentration in place of molar concentration.
- Ignoring units, reaction coefficients, activity assumptions or the stated temperature/model limits.
Check your calculation
- Check the units and balance/coefficients against the worked example. For real laboratory work, verify SDS information and the applicable procedure independently.
Calculation checks, sources and review limits
Which of two reactants limits the product amount?
Which of two reactants limits the product amount? Enter the stated values to calculate this model.
Common uses
- Which of two reactants limits the product amount
How it works
Compare each reactant amount divided by its positive reaction coefficient. The smaller reaction extent limits the theoretical product; use the same balanced-reaction basis for the remainder calculations.
Worked example
Enter First reactant amount: 4 mol; First coefficient: 2 1; Second reactant amount: 3 mol; Second coefficient: 1 1; Product coefficient: 3 1. Results: Theoretical product amount: 6 mol; First reactant remainder: 0 mol; Second reactant remainder: 1 mol.