Chemical Equation Solver & Stoichiometry Calculator
Balance chemical equations and calculate reaction stoichiometry with precise mole ratios and mass relationships
⚗️ Chemical Reaction
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🧪 Common Elements Reference
⚖️ Balanced Equation
2H₂ + O₂ → 2H₂O
Stoichiometric Coefficients
H₂ Coefficient
2
O₂ Coefficient
1
H₂O Coefficient
2
Reaction Type
Combination
Mole Ratios
| Ratio | Value | Interpretation |
|---|---|---|
| H₂ : O₂ | 2:1 | 2 moles H₂ per 1 mole O₂ |
| H₂ : H₂O | 1:1 | 1 mole H₂ produces 1 mole H₂O |
| O₂ : H₂O | 1:2 | 1 mole O₂ produces 2 moles H₂O |
📊 Stoichiometry Results
Given Amount
2.0 moles H₂
Target Amount
2.0 moles H₂O
Mole Ratio
1:1
Mass Required
36.03 g H₂O
Mole Proportion Visualization
H₂: 2 moles
O₂: 1 mole
H₂O: 2 moles
⚖️ Chemical Equation Balancing
Chemical equations must obey the law of conservation of mass – atoms are neither created nor destroyed in chemical reactions.
aA + bB → cC + dD
Coefficients a, b, c, d must balance atoms on both sides
- • Count atoms of each element on both sides
- • Adjust coefficients to balance atoms
- • Start with elements that appear once per side
- • Save elements like H and O for last
🧮 Stoichiometry Calculations
Stoichiometry uses balanced equations to calculate quantities of reactants and products in chemical reactions.
molesB = molesA × (coefficientB / coefficientA)
Mole ratio from balanced equation
mass = moles × molar mass
Convert between mass and moles
🔬 Reaction Types
Chemical reactions can be classified into several fundamental types:
- • Combination: A + B → AB
- • Decomposition: AB → A + B
- • Single Replacement: A + BC → AC + B
- • Double Replacement: AB + CD → AD + CB
- • Combustion: Fuel + O₂ → CO₂ + H₂O
- • Neutralization: Acid + Base → Salt + Water