Stoichiometry Calculator - Calculate Chemical Reactions Online
Free online stoichiometry calculator to calculate mole ratios, limiting reactants, and product yields. Perfect for chemistry students and reaction analysis.
Chemical Reaction
Stoichiometry Results
Enter reaction details to calculate stoichiometry
About Stoichiometry Calculator
The Stoichiometry Calculator helps you calculate the quantitative relationships between reactants and products in chemical reactions.
Stoichiometry Concepts:
- Mole Ratio: Ratio of coefficients in balanced equation
- Limiting Reactant: Reactant that runs out first
- Theoretical Yield: Maximum possible product
- Actual Yield: Amount actually produced
- Percent Yield: (Actual/Theoretical) × 100%
Key Steps:
- Write and balance the chemical equation
- Convert masses to moles using molar mass
- Use mole ratios from balanced equation
- Convert moles back to mass
- Identify limiting reactant if applicable
Common Calculations:
- Mass to Mass: Convert reactant mass to product mass
- Mole to Mole: Use mole ratios directly
- Volume to Volume: For gases at same conditions
- Limiting Reactant: Find which reactant limits the reaction
Applications:
- Chemistry education and homework
- Laboratory calculations
- Industrial chemical processes
- Pharmaceutical manufacturing
- Environmental chemistry
Important Notes:
- Always use balanced chemical equations
- Convert to moles before using ratios
- Consider limiting reactants
- Account for percent yield in real reactions
- Use consistent units throughout
Note: This calculator assumes complete reaction and ideal conditions. Real reactions may have side reactions, incomplete conversion, or other complications.
Frequently Asked Questions
What is stoichiometry?
Stoichiometry is the calculation of quantitative relationships between reactants and products in chemical reactions. It uses balanced chemical equations and mole ratios.
How do I calculate product mass from reactant mass?
Convert reactant mass to moles using molar mass, use the mole ratio from the balanced equation, then convert product moles back to mass using its molar mass.
What is a limiting reactant?
The limiting reactant is the reactant that runs out first in a chemical reaction. It determines the maximum amount of product that can be formed.
How do I find the limiting reactant?
Calculate how much product each reactant can produce. The reactant that produces the least amount of product is the limiting reactant.
What's the difference between theoretical and actual yield?
Theoretical yield is the maximum amount of product possible based on stoichiometry, while actual yield is the amount actually obtained in the laboratory.