A standard Ni/Ni2+ half-cell is coupled with a Ni/Ni2+ half-cell in which the Ni2+ concentration is...

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A standard Ni/Ni2+ half-cell is coupled with a Ni/Ni2+ half-cell in which the Ni2+ concentration is...

A standard Ni/Ni2+ half-cell is coupled with a Ni/Ni2+ half-cell in which the Ni2+ concentration is 0.015 M. What will be the potential of this cell

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Answer 1

Answer #1

Anode : Ni ----------> Ni²⁺ + 2e- Eo = + 0.25 V

Cathode: Ni²⁺ + 2e- ---------> Ni Eo = - 0.25 V

------------------------------------------------

Ni + Ni²⁺ ----------> Ni²⁺ + Ni

no of electrons involved = 2

Eocell = anode potential + cathode potential

= +0.25 V -0.25 V

= 0 V

E = E^o - (0.059/n)log [Ni²⁺]/[Ni²⁺]

= 0 - (0.059/2) log [0.015/0.015]

= 0

E = 0 V

Therefore,

potential of this cell = 0 V

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Answer 2

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