Balancing Equations Practice Worksheet for chemistry students to practice balancing chemical reactions.

I'll work through each equation step by step to balance them properly.

Equation 1: NaNO₃ + PbO → Pb(NO₃)₂ + Na₂O
- Left: Na=1, N=1, O=3+1=4, Pb=1
- Right: Pb=1, N=2, O=6+1=7, Na=2
- Need 2 NaNO₃ on left: 2NaNO₃ + PbO → Pb(NO₃)₂ + Na₂O
- Check: Na=2, N=2, O=6+1=7, Pb=1 ✓

Equation 2: AgI + Fe₂(CO₃)₃ → FeI₃ + Ag₂CO₃
- Left: Ag=1, I=1, Fe=2, C=3, O=9
- Right: Fe=1, I=3, Ag=2, C=1, O=3
- Need 6 AgI and 2 FeI₃: 6AgI + Fe₂(CO₃)₃ → 2FeI₃ + 3Ag₂CO₃
- Check: Ag=6, I=6, Fe=2, C=3, O=9 ✓

Equation 3: C₃H₈O₃ + O₂ → CO₂ + H₂O
- Left: C=3, H=8, O=3+2=5
- Right: C=1, H=2, O=2+1=3
- Need 3 CO₂ and 4 H₂O: C₃H₈O₃ + O₂ → 3CO₂ + 4H₂O
- Count O on right: 6+4=10, need 7 more from O₂
- C₃H₈O₃ + 7/2 O₂ → 3CO₂ + 4H₂O
- Multiply by 2: 2C₃H₈O₃ + 7O₂ → 6CO₂ + 8H₂O ✓

Equation 4: ZnSO₄ + Li₂CO₃ → ZnCO₃ + Li₂SO₄
- Left: Zn=1, S=1, O=4+3=7, Li=2, C=1
- Right: Zn=1, C=1, O=3+4=7, Li=2, S=1
- Already balanced! ✓

Equation 5: V₂O₅ + CaS → CaO + V₂S
- Left: V=2, O=5, Ca=1, S=1
- Right: Ca=1, O=1, V=2, S=5
- Need 5 CaS and 5 CaO: V₂O₅ + 5CaS → 5CaO + V₂S₅ ✓

Equation 6: Mn(NO₃)₂ + BeCl₂ → Be(NO₃)₂ + MnCl₂
- Left: Mn=1, N=2, O=6, Be=1, Cl=2
- Right: Be=1, N=2, O=6, Mn=1, Cl=2
- Already balanced! ✓

Equation 7: AgBr + GaPO₄ → Ag₃PO₄ + GaBr₃
- Left: Ag=1, Br=1, Ga=1, P=1, O=4
- Right: Ag=3, P=1, O=4, Ga=1, Br=3
- Need 3 AgBr: 3AgBr + GaPO → Ag₃PO₄ + GaBr ✓

Equation 8: H₂SO₄ + B(OH)₃ → B₂(SO₄)₃ + H₂O
- Left: H=2+3=5, S=1, O=4+3=7, B=1
- Right: B=2, S=3, O=12+1=13, H=2
- Need 3 H₂SO₄ and 2 B(OH)₃: 3H₂SO₄ + 2B(OH)₃ → B₂(SO₄)₃ + 6H₂O
- Check: H=6+6=12, S=3, O=12+6=18, B=2
- Right: B=2, S=3, O=12+6=18, H=12 ✓

Equation 9: S + O₂ → SO₂
- Left: S=8, O=2
- Right: S=1, O=2
- Need 8 SO₂: S₈ + O₂ → 8SO₂
- Need 16 O atoms: S₈ + 8O₂ → 8SO₂ ✓

Equation 10: Fe + AgNO₃ → Fe(NO₃)₂ + Ag
- Left: Fe=1, Ag=1, N=1, O=3
- Right: Fe=1, N=2, O=6, Ag=1
- Need 2 AgNO₃ and 2 Ag: Fe + 2AgNO₃ → Fe(NO₃)₂ + 2Ag ✓

Final Answer:
1) 2NaNO₃ + PbO → Pb(NO₃)₂ + Na₂O
2) 6AgI + Fe₂(CO₃)₃ → 2FeI₃ + 3Ag₂CO₃
3) 2C₃H₈O₃ + 7O₂ → 6CO₂ + 8H₂O
4) ZnSO₄ + Li₂CO₃ → ZnCO₃ + Li₂SO₄
5) V₂O₅ + 5CaS → 5CaO + V₂S₅
6) Mn(NO₃)₂ + BeCl₂ → Be(NO₃)₂ + MnCl₂
7) 3AgBr + GaPO₄ → Ag₃PO₄ + GaBr₃
8) 3H₂SO₄ + 2B(OH)₃ → B₂(SO₄)₃ + 6H₂O
9) S₈ + 8O₂ → 8SO₂
10) Fe + 2AgNO₃ → Fe(NO₃)₂ + 2Ag