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Balance chemical equations automatically. Enter reactants and products to find correct coefficients. Includes common reaction examples and step-by-step verification.
Chemical equation balancing is the process of adjusting coefficients in a chemical reaction so that the number of atoms of each element is equal on both sides, obeying the law of conservation of mass.
| Reaction | Balanced |
|---|---|
| Hydrogen + Oxygen | 2H₂ + O₂ → 2H₂O |
| Methane Combustion | CH₄ + 2O₂ → CO₂ + 2H₂O |
| Photosynthesis | 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ |
| Iron Rusting | 4Fe + 3O₂ → 2Fe₂O₃ |
| Neutralization | HCl + NaOH → NaCl + H₂O |
Formula
Reactants → Products (atoms balanced on both sides)Coefficient = Number placed before a formula to balance atom counts
Subscript = Number within a formula indicating atoms per molecule
Worked Example
Balance: H₂ + O₂ → H₂O
Did you know? Antoine Lavoisier formulated the law of conservation of mass in 1789, establishing that mass is neither created nor destroyed in chemical reactions (source: Royal Society of Chemistry).
Sources
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