Balance CaCO₃ → CaO + CO₂
CaCO₃(s) → CaO(s) + CO₂(g)
Balance an equation
Arrow. Type -> or =. Subscripts. Plain digits: H2SO4, Ca(OH)2, CuSO4.5H2O. Charges. Fe3+, OH-, SO4 2-, and e- for an electron. States. (s), (l), (g) and (aq) are kept. Coefficients you type are checked.
CaCO₃(s)→CaO(s)+CO₂(g)
Balanced
Atoms on each side
| Atom | As writtenleft : right | Balancedleft : right |
|---|---|---|
| Ca | 1:1 | 1:1 |
| C | 1:1 | 1:1 |
| O | 3:3 | 3:3 |
Check atoms
How to balance it, step by step
- Count each element on both sides. Every count already matches, so no coefficients are needed.
- Check: Ca 1 = 1, C 1 = 1, O 3 = 3. Balanced.
What happens
It is a decomposition reaction: one substance breaks down into simpler ones. Limestone breaks down on heating into quicklime and carbon dioxide. This is how lime is made for cement.
Heating calcium carbonate: quick answers
What is the balanced equation for heating calcium carbonate?
CaCO₃(s) → CaO(s) + CO₂(g). It is already balanced as written, so every coefficient is 1. Each side then has 1 Ca, 1 C and 3 O.
What type of reaction is heating calcium carbonate?
It is a decomposition reaction: one substance breaks down into simpler ones. Limestone breaks down on heating into quicklime and carbon dioxide. This is how lime is made for cement.
How do you balance CaCO₃ → CaO + CO₂?
Count the atoms of each element on both sides: 1 Ca, 1 C and 3 O. They already match, so no coefficients are needed.