PbCl2 (s) → Pb2+ (aq) + 2 Cl- (aq)
Pb2+ (aq) + CrO42- (aq) → PbCrO4 (s)
Pb2+
K2CrO4
PbCrO4
AgCl (s) + 2 NH3 (aq) → Ag(NH3)2+ (aq) + Cl- (aq)
AgCl
NH3
Ag(NH3)2Cl
Hg + HgNH2Cl
NH4Cl
Ag(NH3)2+ (aq) + 2 H+ (aq) → Ag+ (aq) + 2 NH4+ (aq)
Ag+
HNO3
NH4NO3