A current of 3.7 ampere is passed for 6 hrs. between Ni electrodes in

1.	A current of 3.7 ampere is passed for 6 hrs. between Ni electrodes in 0.5 litre of 2 M solution of Ni(NO3)2. What will be the molarity of solution at the end of electrolysis?
Answer» The electrolysis of Ni(NO₃)₂ in presence of Ni electrode will bring in following changes: At anode : Ni -----> Ni²⁺ + 2e At cathode : Ni²⁺ + 2e -----> Ni Eq. of Ni²⁺ formed = Eq. of Ni²⁺ lost Thus, there will be no change in conc. of Ni(NO₃)₂ solution during electrolysis i.e., It will remain 2 M.

A current of 3.7 ampere is passed for 6 hrs. between Ni electrodes in 0.5 litre of 2 M solution of Ni(NO3)2. What will be the molarity of solution at the end of electrolysis?

Answer»

The electrolysis of Ni(NO₃)₂ in presence of Ni electrode will bring in following changes:

At anode : Ni -----> Ni²⁺ + 2e

At cathode : Ni²⁺ + 2e -----> Ni

Eq. of Ni²⁺ formed = Eq. of Ni²⁺ lost

Thus, there will be no change in conc. of Ni(NO₃)₂ solution during electrolysis i.e.,

It will remain 2 M.

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A current of 3.7 ampere is passed for 6 hrs. between Ni electrodes in 0.5 litre of 2 M solution of Ni(NO3)2. What will be the molarity of solution at the end of electrolysis?

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