Question

Write balanced chemical equations for each reaction described below. 1. Synthesis Reactions a) Dipbosborous trioxide is formed by direct combination of its elements 4P (s)+302(g) → P203 (e) b) Magnesium oxide and carbon dioxide combine to form magnesium carbonate Mgo (s) + CO2(g) → Mg (CO3) (s) 2. Decomposition Reactions a) Potassium chlorate decomposes into potassium chloride and oxygen gas 2KClO3 (ag) → 2 KClO2 lag) + 3 02 (g) b) Calcium sulfate decomposes into calcium oxide and sulfur trioxide Cas04 → CaQ+503 3. Single Displacement Reactions a) Zinc reacts with silver sulfate Zn + Ag2504 → ZnSO4+2 b) Aluminum reacts with copper(1) chloride 2A (5)+ 3CuCl2 (ag) → 2AlCi3 (ag)+ 3Cu (s) 4. Double Displacement Reactions Remember to include state symbols to show if a precipitate forms. a) Aqueous aluminum sulfate reacts with aqueous barium chloride. 2Al(SO4)(ag) + 3BaCl2 lag) 2AlCl3 (ag) + 3BaSO4(S) b) Aqueous calcium hydroxide reacts with phosphoric acid 3 Ca(OH)2 (ag) + 2H3PO4 (ag) - Ca3PO4 + 6 H20 (1) 5. Complete oxidation or burning of organic compounds a) The combustion of liquid pentane, CsHu C5H12(e) + BO2 (g) → 5 CO2(e) + 6 H20 (1) b) The combustion of methanol, CH OH 2CH3OH (0) + 302 (e) → 2002 (e) + 4H2O(g)

Answer 1

The balanced chemical equations are 1)a) 4P(S) + 30,(g) = 2P203 (9) 1 MgO(S) + 1C02(9)= 1HgCO3(S) 2) a) 2 KClO2(29) = 2 KCLO, (aq) + 102(8) b) 1 Ca S04 = 1 Ca 0 + 1 50 3)a) Zn + Ag, S04 = ZnSO4 + 2Ag b) 2 AL(S) + 3 Cully(aq) = 2 AlCl3(429) + 3 Cu(s) 4)a) Al2(S04)3(aq) + 3 Baclzlaq) = - - 2 Al llz . (aq) + 3 Basoa b) 3Ca (OH), (aq) + 2 H3 PO4 = 1 ca 3(204)+ 6 H2O 5)a) 1-C5 H12 (9) + 802(0= 5 CO2(g) + 6H20(1) b) 2 CH3OH (l) + 302 (9) = 2002(9) +48 H2009)