1. What is Limited Reagent?

The limited reagent (or limiting reactant) in a chemical reaction is the substance that is completely consumed first, limiting the amount of product that can be formed. It determines the maximum yield of the reaction.

2. How Does the Calculator Work?

The calculator uses the limited reagent formula:

Where:

• \( LR \) — Limited reagent value
• \( M_i \) — Moles of reactant
• \( S_i \) — Stoichiometric coefficient

Explanation: The calculation determines which reactant will be completely consumed first by comparing the mole-to-coefficient ratios of all reactants.

3. Importance of Limited Reagent Calculation

Details: Identifying the limiting reagent is crucial for predicting reaction yields, optimizing reactant quantities, and calculating theoretical product amounts in chemical reactions.

4. Using the Calculator

Tips: Enter the moles of reactant and its stoichiometric coefficient. For multiple reactants, calculate each ratio separately and compare to find the minimum value.

5. Frequently Asked Questions (FAQ)

Q1: Why is the limited reagent important?
A: It determines the maximum amount of product that can be formed in a chemical reaction and helps optimize reactant usage.

Q2: How do I find the limited reagent in a reaction?
A: Calculate the mole-to-coefficient ratio for each reactant and identify which one gives the smallest value.

Q3: What happens if I have excess reagent?
A: Excess reagent will remain after the reaction is complete, while the limiting reagent will be completely consumed.

Q4: Can the limited reagent change?
A: Yes, if reactant quantities are altered, a different reactant may become the limiting reagent.

Q5: How does this relate to percent yield?
A: Percent yield is calculated by comparing the actual yield to the theoretical yield determined by the limiting reagent.