Chemistry Essentials Writing Equations Worksheet ANSWERS For each situation below, 1) underline the reactants, circle the products, and box symbols 2) write word equations, and 3) write standard (symbolic) equations. 1) Zinc and aqueous lead (II) nitrate react to form aqueous zinc nitrate and lead metal. Zinc + aqueous lead (II) nitrate aqueous zinc nitrate + lead metal. Zn(s) + Pb(NO3)2(aq) Zn(NO3)2(aq) + Pb(s) 2) Aqueous aluminum bromide and chlorine gas react to form aqueous aluminum chloride and bromine gas. Aqueous aluminum bromide + chlorine gas aqueous aluminum chloride + bromine gas. AlBr3(aq) + Cl2(g) AlCl3(aq) + Br2(g) 3) Aqueous sodium phosphate and aqueous calcium chloride react to form solid calcium phosphate and aqueous sodium chloride. Aqueous sodium phosphate + aqueous calcium chloride solid calcium phosphate + aqueous sodium chloride. Na3PO4(aq) + CaCl2(aq) Ca3(PO4)2(s) + NaCl(aq) 4) Potassium metal and chlorine gas combine to form solid potassium chloride. Potassium metal +chlorine gas solid potassium chloride. K(s) + Cl2(g) KCl(s) 5) Aluminum and hydrochloric acid react to form aqueous aluminum chloride and hydrogen gas. Aluminum + hydrochloric acid aqueous aluminum chloride + hydrogen gas Al(s) + HCl(aq) AlCl3(aq) + H2(g) 6) Aqueous calcium hydroxide and phosphoric acid react to form solid calcium phosphate and liquid water. Aqueous calcium hydroxide + phosphoric acid solid calcium phosphate + liquid water. Ca(OH)2(aq) + H3PO4(aq) Ca3(PO4)2(s) + H2O(l) 7) Copper and sulfuric acid react to form aqueous copper (II) sulfate and liquid water and sulfur dioxide gas. Copper + sulfuric acid aqueous copper (II) sulfate + liquid water + sulfur dioxide gas. Cu(s) + H2SO4(aq) CuSO4(aq) + H2O(l) + SO2(g) 8) Hydrogen gas and nitrogen monoxide gas react to form liquid water and nitrogen gas. Hydrogen gas + nitrogen monoxide gas liquid water + nitrogen gas. H2(g) + NO(g) H2O(l) + N2(g) 9) Zinc metal and elemental sulfur react to form solid zinc sulfide Zinc metal + elemental sulfur solid zinc sulfide Zn(s) + S(s) ZnS(s) 10) Hydrogen gas and oxygen gas react to form liquid water Hydrogen gas + oxygen gas liquid water H2(g) + O2(g) H2O(l) .