cobalt (II) sulfate reacts with lead (II) nitrate farming cobalt (II) nitrate and lead (II) sulfate

##"CoSO"_4+"Pb(NO"_3)_2->"Co(NO"_3)_2+"PbSO"_4##

Reactants: 1. Cobalt (II) ##=>## An ion of Cobalt, Co having valency of ##2+ =>"Co"^(2+)## and Sulfate ##=>"SO"_4^(2-)## ion Combining both the chemical formula of first reactant is ##"CoSO"_4## 2. Similarly Lead (II) ##=>"Pb"^(2+)## and Nitrate ##=>"NO"_3^-## ion Observe that each ion of Lead will require two ions of nitrate to satisfy (quench) its valency. Therefore, combining both we obtain chemical formula of second reactant as ##"Pb(NO"_3)_2##

Products: Following the same logic as used for reactants 1. Cobalt (II) Nitrate has chemical formula as ##"Co(NO"_3)_2## and 2. Lead (II) Sulfate has chemical formula as ##"PbSO"_4##

Writing the chemical equation of the reaction Reactants ##->## Products

##"CoSO"_4+"Pb(NO"_3)_2->"Co(NO"_3)_2+"PbSO"_4## Inspection reveals that the equation is already balanced.