Chemical Equation Balancer
Balance chemical equations instantly with step-by-step guidance
Balance Your Equation
How to use:
Enter your chemical equation using standard chemical formulas. Example: H2 + O2 = H2O
Use element symbols (H, O, C, etc.) and numbers for subscripts
Separate reactants and products with = or →
Balanced Equation:
Frequently Asked Questions
What is a balanced chemical equation?
A balanced chemical equation has equal numbers of each type of atom on both sides of the equation. It represents the law of conservation of mass, showing that matter cannot be created or destroyed in a chemical reaction.
How do you balance chemical equations?
To balance equations: (1) Count atoms of each element on both sides, (2) Add coefficients (numbers before compounds) to make atom counts equal, (3) Start with the most complex molecule, (4) Save single elements for last, (5) Check your work.
Why do we balance chemical equations?
We balance equations to obey the law of conservation of mass. In any chemical reaction, atoms are neither created nor destroyed—they're just rearranged. A balanced equation ensures we account for all atoms correctly.
What are coefficients in chemical equations?
Coefficients are the numbers placed before chemical formulas in an equation. They indicate how many molecules or moles of each substance participate in the reaction. In 2H₂ + O₂ → 2H₂O, the coefficients are 2, 1, and 2.
Can you change subscripts when balancing equations?
No! Never change subscripts when balancing equations. Subscripts are part of the chemical formula and changing them would create a different substance. Only add coefficients in front of formulas. Changing H₂O to H₃O would be incorrect.
What if an equation can't be balanced?
All valid chemical reactions can be balanced. If you can't balance an equation, check that: (1) Formulas are written correctly, (2) The reaction is chemically possible, (3) You haven't made arithmetic errors. Some reactions may require fractional coefficients initially.