Chemistry worksheet key showing balanced chemical equations and their reaction types.

1. 2 Sb + 3 Cl₂ → 2 SbCl₃ (synthesis)
2. 2 Mg + O₂ → 2 MgO (synthesis)
3. CaCl₂ → Ca + Cl₂ (decomposition)
4. 2 NaClO₃ → 2 NaCl + 3 O₂ (decomposition)
5. Fe + 2 HCl → FeCl₂ + H₂ (single replacement)
6. CuO + H₂ → Cu + H₂O (single replacement)
7. 2 Al + 3 H₂SO₄ → Al₂(SO₄)₃ + 3 H₂ (single replacement)
8. MgBr₂ + Cl₂ → MgCl₂ + Br₂ (single replacement)
9. SnO₂ + 2 C → Sn + 2 CO (single replacement)
10. Pb(NO₃)₂ + H₂S → PbS + 2 HNO₃ (double replacement)
11. 2 HgO → 2 Hg + O₂ (decomposition)
12. 2 KClO₃ → 2 KCl + 3 O₂ (decomposition)
13. N₂ + 3 H₂ → 2 NH₃ (synthesis)
14. 2 NaBr + Cl₂ → 2 NaCl + Br₂ (single replacement)
15. Zn + 2 AgNO₃ → Zn(NO₃)₂ + 2 Ag (single replacement)
16. Sn + 2 Cl₂ → SnCl₄ (synthesis)
17. Ba(OH)₂ → BaO + H₂O (decomposition)