Excess Reagent Calculator

Identify the limiting reagent and calculate the excess reagent remaining after a chemical reaction.

Number of Reactants *

Significant Figures

Reactant 1

Name *

Amount (g) *

Molar Mass (g/mol) *

Stoichiometric Coefficient *

Reactant 2

Name *

Amount (g) *

Molar Mass (g/mol) *

Stoichiometric Coefficient *

Show Steps

Show Excess Details

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Limiting & Excess Reagent

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Reagent Comparison

Visual comparison of reactants

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Calculation Breakdown

Step-by-step limiting reagent calculation

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Limiting Reagent

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Completely consumed

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Excess Reagent(s)

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Remaining after reaction

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Product Yield

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Based on limiting reagent

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Mole Ratio

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Stoichiometric

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Excess Reagent Details

Amount of each reagent remaining

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Key Concepts

Understanding limiting and excess reagents

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Tips

Understanding limiting reagents

📊 Chemical Disclaimer: This calculator assumes 100% reaction efficiency. Actual yields may vary. Results are for educational purposes.