Answer : When we combined the aqueous solutions of nickel nitrate and potassium hydroxide a displacement reaction will occur.
The whole reaction is explained below:-
[tex]Ni(NO _{3}) _{2} + 2 KOH ----\ \textgreater \ Ni(OH) _{2} + 2 [KNO _{3} ].[/tex]
Now according to the OWL preparation page soluibility rules the compounds that are included in the reactants are perfectly soluble and hence undergo a displacement reaction yielding a precipitate at the completion of reaction.
The net ionic equation of the reaction is :
[tex]Ni ^{(+2)} _{(aq.)} + 2 OH ^{(-)} _{(aq.)} ----\ \textgreater \ Ni (OH) _{2} _{(s)}[/tex]
