A current of 3.7A is passed for 6 hrs between Ni electrodes in 0.5L of 2M solution of Ni(NO3)2. What will be the molarity of solution at the end of electrolysis ?
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The molarity of the solution at the end of electrolysis will remain same.
Explanation:
The electrolysis of Ni(NO3)2 in presence of Ni electrode is given as below.
- At anode: Ni→Ni2+ + 2e
- At cathode: Ni2+ + 2e → Ni
Equation of Ni2+ formed = Equation of Ni2+ lost
Hence there will be no change in concentration of Ni(NO3)2 solution during electrolysis . therefore the molarity will remain same that is 2M.
Hence the molarity of the solution at the end of electrolysis will remain same.
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