Solution of problem 583 of the collection on general ch

Solution of problem 583 of the collection on general ch

583. To formulate in the molecular form the reaction equations, which are expressed by the following ion-molecular equations:
NO2- + H + = HNO2
Cu2 ++ 2OH- = Cu (OH) 2 ↓
Pb2 ++ 2I- = PbI2 ↓