Homework 14.2

For each of the following reactions, write the chemical equation (be sure that your chemical formulas are correct), balance the equation, write the ionic equation (indicating if a precipitate forms by checking table 14-1), and, if appropriate, the net ionic equation:

a) solution of magnesium acetate and solution of strontium chloride are combined

Mg(CH₃COO)_2(aq) + SrCl_2(aq) ---> Sr(CH₃COO)_2(aq) + MgCl_2(aq)

Mg⁺²_(aq) + 2 CH₃COO^-1_(aq) + Sr⁺²_(aq) + 2Cl^-1_(aq) ----> Sr⁺²_(aq) + 2CH₃COO^-1_(aq) + Mg⁺²_(aq) + 2Cl^-1_(aq)

<sup>b) solution of mercury (II) chloride and a solution of potassium sulfide are combined

HgCl</sup>_2(aq) ^{+ K}₂^S_(aq) ^{----> HgS(s) + KCl}_(aq)

Hg⁺²_(aq) +2Cl^-1_(aq) + 2K⁺¹_(aq) + S^-2_(aq) ----> HgS_(s) + K⁺¹_(aq) + Cl^-1_(aq)

Hg⁺²_(aq) + S^-2_(aq) ----> HgS_(s)


c) solution of sodium carbonate and a solution of calcium chloride are combined

^Na₂^CO_3(aq) ^{+ CaCl}_2(aq) ^{----> NaCl}_(aq) ^{+ CaCO}_3(s)

2Na⁺¹_(aq) + CO3^-2_(aq) + Ca⁺²_(aq) + 2Cl^-1_(aq) ----> Na⁺¹_(aq) + Cl^-1_(aq) + CaCO_3(s)

CO3^-2_(aq) + Ca⁺²_(aq) ----> CaCO_3(s)

d) a solution of copper (II) chloride and a solution of ammonium phosphate are combined

^{3 CuCl}_2(aq) ^{+ 2 (NH}₄⁾₃^PO_4(aq) ^{---> 6 NH}₄^Cl_(aq) ^{+ Cu}₃^(PO₄⁾_2(s)

3 Cu⁺²_(aq) + 2 Cl^-1_(aq) 6 NH₄⁺¹_(aq) + 2 PO₄^-3_(aq) ----> 6 NH4⁺¹_(aq) + 6 Cl^-1_(aq) + ^Cu₃^(PO₄⁾_2(s)

3 Cu⁺²_(aq) + 2 PO₄^-3_(aq) ---->^Cu₃^(PO₄⁾_2(s)

e) a solution of copper (II) chloride and a solution of lead (II) nitrate are combined

CuCl_2(aq) + Pb(NO₃)_2(aq) ----> Cu(NO₃)_2(aq) + PbCl_2(s)

Cu⁺²_(aq) + 2 Cl^-1_(aq) + Pb⁺²_(aq) + 2 NO₃^-1_(aq)
----> Cu⁺²_(aq) + 2 NO₃^-1_(aq) + PbCl_2(s)

Pb⁺²_(aq) + 2 Cl^-1_(aq) ----> PbCl_2(s)