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Balance chemical equations, including ionic and redox equations with charges, exactly, with an atom-by-atom check of both sides.
Also covers: Balance chemical equations ยท Redox equation balancer ยท Chemical reaction balancer
Use -> or = between sides and + between substances. Charges: Fe^3+, MnO4^-, e^- for electrons.
Balanced equation
C3H8 + 5O2 โ 3CO2 + 4H2O
Coefficients: 1, 5, 3, 4
Atom check
| Reactants | Products | |
|---|---|---|
| C | 3 | 3 |
| H | 8 | 8 |
| O | 10 | 10 |
Balanced by solving the atom-conservation equations exactly (a matrix null space on fractions), then scaling to the smallest whole numbers.
Reactants, an arrow (-> or =), then products, with + between substances, e.g. C3H8 + O2 -> CO2 + H2O.
Write charges with ^, like Fe^3+ or MnO4^-, and electrons as e^-. Charge is balanced along with the atoms.
You get the smallest whole-number coefficients and an atom-by-atom (and charge) check of both sides.
Each element gives one equation: atoms in must equal atoms out. Those equations are solved exactly with fractions (a matrix null space), then scaled to the smallest whole numbers. No guessing or trial and error.
Some equations combine two or more independent reactions, so many sets of coefficients work. Split it into separate reactions, or check that each formula is right.
No. It only balances atoms and charge; whether the reaction is chemically possible is up to you.
No. Every calculation runs in your browser.
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