Excess Reagent Calculator

This calculator determines the amount of excess reagent remaining after a chemical reaction based on the amounts of reactants used and their stoichiometric coefficients.

Input Parameters

Calculation Results

Calculation Formula

Excess Reagent = Initial Amount - (Amount Used in Reaction)

Where:
Initial Amount = Amount of reagent provided
Amount Used in Reaction = (Initial Amount / Stoichiometric Coefficient) * Coefficient of Other Reactant

Excess Reagent Calculator Calculator Usage Guide

Learn how to use the Excess Reagent Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the names of the two reactants in the "Reactant 1 Name" and "Reactant 2 Name" fields.
  2. Input the amount (in moles) of each reactant used in the reaction.
  3. Provide the stoichiometric coefficients of each reactant as per the balanced chemical equation.
  4. Click the "Calculate" button to determine the excess reagent and the limiting reactant.
  5. The results will display the amount of excess reagent remaining and the limiting reactant.

Working Principle

The calculator determines the limiting reactant by comparing the mole ratios of the reactants used in the reaction. The limiting reactant is the one that is completely consumed first, and the excess reagent is the one that remains after the reaction is complete.

The amount of excess reagent is calculated as:

Excess Reagent = Initial Amount - (Amount Used in Reaction)

The amount used in the reaction is determined by the stoichiometric coefficients of the balanced chemical equation.