Worksheet on writing and balancing chemical reactions, including balancing equations and predicting products.

- a. 2 Cu(s) + O₂(g) → 2 CuO(s) - formation
- b. 2 H₂O(l) → 2 H₂(g) + O₂(g) - decomposition
- c. 3 Fe(s) + 4 H₂O(g) → 4 H₂(g) + Fe₃O₄(s) - single replacement
- d. 2 AsCl₃(aq) + 3 H₂S(aq) → As₂S₃(s) + 6 HCl(aq) - double replacement
- e. CuSO₄·5H₂O(s) → CuSO₄(s) + 5 H₂O(g) - decomposition
- f. Fe₂O₃(s) + 3 H₂(g) → 2 Fe(s) + 3 H₂O(l) - single replacement
- g. CaCO₃(s) → CaO(s) + CO₂(g) - decomposition
- h. 8 Fe(s) + S₈(s) → 8 FeS(s) - formation
- i. H₂S(aq) + 2 KOH(aq) → 2 H₂O(l) + K₂S(aq) - double replacement
- j. 2 NaCl(l) → 2 Na(l) + Cl₂(g) - decomposition
- k. 2 Al(s) + 3 H₂SO₄(aq) → 3 H₂(g) + Al₂(SO₄)₃(aq) - single replacement
- l. H₃PO₄(aq) + 3 NH₄OH(aq) → 3 H₂O(l) + (NH₄)₃PO₄(aq) - double replacement
- m. C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(l) - hydrocarbon combustion
- n. 4 Al(s) + 3 O₂(g) → 2 Al₂O₃(s) - formation
- o. CH₄(g) + 2 O₂(g) → CO₂(g) + 2 H₂O(l) - hydrocarbon combustion
- p. K₂SO₄(aq) + BaCl₂(aq) → 2 KCl(aq) + BaSO₄(s) - double replacement
- q. C₅H₁₂(l) + 8 O₂(g) → 5 CO₂(g) + 6 H₂O(g) - hydrocarbon combustion
- r. Ca(OH)₂(aq) + 2 NH₄Cl(aq) → 2 NH₄OH(aq) + CaCl₂(aq) - double replacement
- s. V₂O₅(s) + 5 Ca(s) → 5 CaO(s) + 2 V(s) - single replacement
- t. 2 Na(s) + ZnI₂(aq) → 2 NaI(aq) + Zn(s) - single replacement
- u. C₇H₆O₃(l) + 7 O₂(g) → 7 CO₂(g) + 3 H₂O(l) - hydrocarbon combustion
- v. 3 Ca(s) + N₂(g) → Ca₃N₂(s) - formation
- w. Fe₂O₃(s) + 3 H₂(g) → 2 Fe(s) + 3 H₂O(l) - single replacement
- x. 2 C₁₅H₃₀(l) + 45 O₂(g) → 30 CO₂(g) + 30 H₂O(g) - hydrocarbon combustion
- y. 2 BN(s) + 3 F₂(g) → 2 BF₃(s) + N₂(g) - single replacement
- z. 2 C₁₂H₂₆(l) + 37 O₂(g) → 24 CO₂(g) + 26 H₂O(g) - hydrocarbon combustion