Q: Answer all blanks A: A Voyage through Equations — Complete Answer Key --- Section 1: Identify the Type of Reaction Reaction Type ------------------- 1 Na₃PO₄ + 3 KOH → 3 NaOH + K₃PO₄ DD Double Displacement 2 MgCl₂ + Li₂CO₃ → MgCO₃ + 2 LiCl DD Double Displacement 3 C₆H₁₂ + 9 O₂ → 6 CO₂ + 6 H₂O C Combustion 4 Pb + FeSO₄ → PbSO₄ + Fe SD Single Displacement 5 CaCO₃ → CaO + CO₂ D Decomposition 6 P₄ + 3 O₂ → 2 P₂O₃ S Synthesis 7 2 RbNO₃ + BeF₂ → BeNO₃₂ + 2 RbF DD Double Displacement 8 2 AgNO₃ + Cu → CuNO₃₂ + 2 Ag SD Single Displacement 9 C₃H₆O + 4 O₂ → 3 CO₂ + 3 H₂O C Combustion 10 2 C₅H₅ + Fe → FeC₅H₅₂ S Synthesis 11 SeCl₆ + O₂ → SeO₂ + 3 Cl₂ SD Single Displacement 12 2 MgI₂ + MnSO₃₂ → 2 MgSO₃ + MnI₄ DD Double Displacement 13 2 NO₂ → 2 O₂ + N₂ D Decomposition 14 C₆H₆ + 15/2 O₂ → 3 H₂O + 6 CO₂ or multiply through: × 2 C Combustion 14 balanced: 2 C₆H₆ + 15 O₂ → 6 H₂O + 12 CO₂ --- Five Types of Chemical Reaction Worksheet Balance + Identify Type 1 2 NaBr + 1 CaOH₂ → 1 CaBr₂ + 2 NaOH Type: Double Displacement 2 2 NH₃ + 1 H₂SO₄ → 1 NH₄₂SO₄ Type: Synthesis 3 1 C₅H₁₀O + 7 O₂ → 5 CO₂ + 5 H₂O C₅H₁₀O: 5C→5CO₂, 10H→5H₂O, +1O from molecule = 10+5−1 = 14/2 = 7 O₂ Type: Combustion 4 3 Pb + 2 H₃PO₄ → 3 H₂ + 1 Pb₃PO₄₂ Type: Single Displacement 5 1 Li₃N + 3 NH₄NO₃ → 3 LiNO₃ + 1 NH₄₃N Type: Double Displacement 6 3 HBr + 1 AlOH₃ → AlBr₃ + 3 H₂O Type: Double Displacement 7 In a double displacement reaction both reactants are compounds ionic, so the cations swap partners. In a single displacement reaction, one reactant is a pure element and one is a compound — the element displaces an ion in the compound. 8 Combustion reactions always produce CO₂ carbon dioxide and H₂O water as the two products that remain consistent along with the oxygen reactant. --- Section 2: Practicing Equation Balancing Blanks only — the numbers already filled in by the student are shown in bold; remaining blanks filled here Balanced Equation Type ---------------------------- 1 2 C₆H₆ + 15 O₂ → 6 H₂O + 12 CO₂ Combustion 2 4 NaI + 1 PbSO₄₂ → 1 PbI₄ + 2 Na₂SO₄ Double Displacement 3 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O Single Displacement / Synthesis 4 2 FeOH₃ → 1 Fe₂O₃ + 3 H₂O Decomposition 5 2 HNO₃ + 1 MgOH₂ → 2 H₂O + 1 MgNO₃₂ Double Displacement 6 1 H₃PO₄ + 3 NaBr → 3 HBr + 1 Na₃PO₄ Double Displacement 7 1 C + 4 H₂ → 1 C₃H₈ must be: 3C + 4H₂ → C₃H₈ 3 C + 4 H₂ → 1 C₃H₈ Synthesis 8 1 CaO + 1 MnI₂ → 1 MnO₂ + 1 CaI₂ check: Ca²⁺ balances; Mn²⁺; but MnO needs MnO not MnO₂ → 2 CaO + 1 MnI₂ → 1 MnO₂ + 2 CaI₂ Mn goes +2→+4, Ca goes +2→+2; O: 2 on left vs 2 on right ✓ Single Displacement 9 1 Fe₂O₃ + 3 H₂O → 2 FeOH₃ Synthesis 10 1 C₂H₂ + 2 H₂ → 1 C₂H₆ Synthesis 11 2 VF₅ + 5 HI → 1 V₂I₁₀ + 5 HF Double Displacement 12 1 OsO₄ + 1 PtCl₄ → 1 PtO₂ + 1 OsCl₄ or: 2OsO₄ + 2PtCl₄ → 2PtO₄ + 2OsCl₄ Balanced: 1 OsO₄ + 1 PtCl₄ → 1 PtO₂ + 1 OsCl₄ Double Displacement 13 1 CF₄ + 2 Br₂ → 1 CBr₄ + 2 F₂ Single Displacement 14 2 Hg₂I₂ + 1 O₂ → 2 Hg₂O + 1 I₂ Synthesis/Combustion 15 1 YNO₃₂ + 1 GaPO₄ → 1 YPO₄ + 1 GaNO₃₂ Note: Y is typically +3 so YNO₃₃; assuming as written Double Displacement --- Section 3: Predicting the Products Completed & Balanced Reaction Type ---------------------------------------- 1 2 Ag + CuSO₄ → Ag₂SO₄ + Cu Single Displacement 2 2 NaI + CaCl₂ → CaI₂ + 2 NaCl Double Displacement 3 2 O₂ + 2 H₂ → 2 H₂O or: 2H₂ + O₂ → 2H₂O Synthesis 4 2 HNO₃ + MnOH₂ → MnNO₃₂ + 2 H₂O Double Displacement 5 AgNO₂ + BaSO₄ → No reaction BaSO₄ is insoluble; no driving force — or if written as: 2 AgNO₃ + BaSO₄ → Ag₂SO₄ + BaNO₃₂ Double Displacement 6 2 HCN + CuSO₄ → CuCN₂ + H₂SO₄ Double Displacement 7 H₂O + AgI → No reaction AgI insoluble, no driving force — 8 3 HNO₃ + FeOH₃ → FeNO₃₃ + 3 H₂O Double Displacement 9 2 LiBr + CoSO₃₂ → 2 LiSO₃... wait: 2Li⁺ can't balance SO₃²⁻ alone Balanced: 2 LiBr + CoSO₃₂ → CoBr₂ + Li₂SO₃ 2 Li balanced? 2 Li → Li₂SO₃ ✓, 2 Br → CoBr₂ ✓, 1 Co ✓, 1 SO₃ ✓ 2 LiBr + CoSO₃₂ → CoBr₂ + Li₂SO₃ only half the sulfite balanced — need 2 LiBr per SO₃²⁻, so: 4 LiBr + CoSO₃₂ → CoBr₂ + 2 Li₂SO₃ Double Displacement 10 LiNO₃ + Ag → No reaction Ag cannot displace Li, Li is more active — 11 N₂ + O₂ → 2 NO Synthesis 12 H₂CO₃ → H₂O + CO₂ Decomposition 13 AlCl₃ + 3 Cs → 3 CsCl + Al Single Displacement 14 AlNO₃₃ + Ga → GaNO₃₃ + Al only if Ga is more active than Al — actually Al is more active than Ga, so No reaction — 15 H₂SO₄ + 2 NH₄OH → NH₄₂SO₄ + 2 H₂O Double Displacement 16 CH₃COOH + 2 O₂ → 2 CO₂ + 2 H₂O Combustion 17 C₄H₈ + 6 O₂ → 4 CO₂ + 4 H₂O Combustion 18 2 KCl + MgOH₂ → MgCl₂ + 2 KOH Double Displacement 19 Zn + AuNO₂₂ → ZnNO₂₂ + Au Single Displacement 20 2 KOH + H₂SO₄ → K₂SO₄ + 2 H₂O Double Displacement 21 BaS + PtCl₂ → BaCl₂ + PtS Double Displacement 22 2 Na₂O → 4 Na + O₂ decomposition or 2 Na₂O + H₂O → 4 NaOH if water present Most likely: 2 Na₂O → 4 Na + O₂ Decomposition
