Step – 1 : Write the unbalanced equation using correct chemical formula for all substances.
Cu2S + O2 → Cu2O + SO2
Step – 2 : Compare number of atoms of each element on both sides.
Atom |
No. of atoms in LHS |
No. of atoms in RHS |
Cu |
2 |
2 |
S |
1 |
1 |
O |
2 |
3 |
Balancing Cu, S, O atoms both sides
2Cu2S + 3O2→ 2Cu2O + 2SO2
The equation is balanced.
Step – 3 : Write the coefficient of smallest ratio.
2Cu2S + 3O2 → 2Cu2O + 2SO2
Step – 4 : Verify above equation for balancing of atoms of each element on both sides.
2Cu2S + 3O2 → 2Cu2O + 2SO2