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Standard Hydrogen electrode and measurement of electrode potential

The standard reduction potentials for Z n^{2+} / Z n, N i^{2+}

Question

Medium

Solving time: 3 mins

The standard reduction potentials for $Z n^{2 +} / Z n, N i^{2 +} / N i$ and $F e^{2 +} / F e$ are $- 0.76, - 0.23$ and $- 0.44 V$ respectively. The reaction $X + Y^{2 +} \to X^{2 +} + Y$ will be spontaneous when :

X = N i, Y = Z n

X = F e, Y = Z n

X = Z n, Y = N i

X = N i, Y = F e

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Updated on: May 2, 2023

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Scarlett Discussed

The standard reduction potentials for

Z n^{2 +} / Z n, N i^{2 +} / N i

and

F e^{2 +} / F e

are

- 0.76, - 0.23

and

- 0.44 V

respectively. The reaction

X + Y^{2 +} \to X^{2 +} + Y

will be spontaneous when :

15 mins ago

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15 mins ago

Text solutionVerified

Zn + Ni^{2 +} ⟶ Zn^{2 +} + Ni E_{Cel}^{0} = E_{Zn / Zn^{2 +}}^{\circ} + E_{N^{2 +} / Ni}^{\circ}

E^{\circ} = E_{O P_{Z n}}^{\circ} + E_{R P_{N i}}^{\circ} = 0.76 - 0.23 = 0.53 V

E_{cell}

for

Zn ∣ ∣ Zn^{2 +} ∣ ∣ ∣ ∣ N i^{2 +} ∣ ∣ N i

is positive

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Question Text	The standard reduction potentials for $Z n^{2 +} / Z n, N i^{2 +} / N i$ and $F e^{2 +} / F e$ are $- 0.76, - 0.23$ and $- 0.44 V$ respectively. The reaction $X + Y^{2 +} \to X^{2 +} + Y$ will be spontaneous when :
Updated On	May 2, 2023
Topic	Electrochemistry
Subject	Chemistry
Class	Class 12
Answer Type	Text solution:1 Video solution: 11
Upvotes	1272
Avg. Video Duration	10 min

The standard reduction potentials for $Z n^{2 +} / Z n, N i^{2 +} / N i$ and $F e^{2 +} / F e$ are $- 0.76, - 0.23$ and $- 0.44 V$ respectively. The reaction $X + Y^{2 +} \to X^{2 +} + Y$ will be spontaneous when :

Text solutionVerified

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The standard reduction potentials for $Z n^{2 +} / Z n, N i^{2 +} / N i$ and $F e^{2 +} / F e$ are $- 0.76, - 0.23$ and $- 0.44 V$ respectively. The reaction $X + Y^{2 +} \to X^{2 +} + Y$ will be spontaneous when :