Chemical Equation Balancer
Select or check balanced stoichiometric coefficients for common chemical reactions.
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Calculation Parameters
Adjust the values below.
Calculated Result
Balanced Equation
2 H₂ + O₂ → 2 H₂O
Atom Counts:
Reactants: 4 H, 2 O | Products: 4 H, 2 O 💡
Expert Tip
Ensure units are correctly formatted (e.g. Kelvin for gas temperatures and liters for volumes) to get chemically accurate outputs.
Frequently Asked Questions
Why must chemical equations be balanced? ▼
Chemical equations must be balanced to obey the Law of Conservation of Mass; total atoms of each element must remain equal.
What is a stoichiometric coefficient? ▼
A stoichiometric coefficient is the number placed in front of a chemical formula to balance total atom counts.
How do you balance combustion reactions? ▼
Balance carbon atoms first, hydrogen atoms second, and oxygen atoms last.
Equation Balancing Concept
Balancing ensures the law of conservation of mass is satisfied. The number of atoms of each element must be equal on both sides of the equation.