The first one is done for you as a model. Notice you can have more than one reaction type. Chemical Reaction Observations Reaction Type Iron and copper (II) sulfate Fe + CuSO4(aq) → Fe2(SO4)3(aq) + Cu(s) Balanced Reaction? 2Fe + 3CuSO4(aq) → Fe2(SO4)3(aq) + 3Cu(s) The gray solid changes from gray to a gold color. Single Replacement, Redox Lead (II) nitrate and potassium iodide Pb(NO3)2(aq) + KI(aq) → KNO3(aq) + PbI2(s) Balanced Reaction? Pb(NO3)2(aq) + KI(aq) → KNO3(aq) + PbI2(s) Magnesium metal and hydrochloric acid Mg(s) + HCl(aq) → MgCl2(aq) + H2(g) Balanced Reaction? Mg(s) + HCl(aq) → MgCl2(aq) + H2(g)