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Standard XII

Chemistry

EMF

Standard redu...

Question

Standard reduction potentials of $S n^{2 +} | S n$ and $Z n^{2 +} | Z n$ electrodes are 0.14V and 0.74 V respectively. What is the $E^{\circ}$ of the cell $Z n | Z n^{2 +} | | S n^{2 +} | S n$ in volt?

-0.6

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-0.88

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0.88

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0.6

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Solution

The correct option is A -0.6
$Z n | Z n^{2 +} | | S n^{2 +} | S n$
$Z n^{2 +} \to Z n$ ; $S R P = 0.74 V$
$S n^{2 +} \to Sn; SRP = 0.14 V$
$∴ Z n | Z n^{2 +} | | S n^{2 +} | S n$
Reactoin is $: S n^{2 +} + Z n \to Z n^{2 +} + S n$
$∴ Electrical potential = E_{c a t h} - E_{a n o d e} = 0.14 - 0.74$ $= - 0.6 V$

Option A is correct.

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Standard reduction potentials of Sn2+|Sn and Zn2+|Zn electrodes are 0.14V and 0.74 V respectively. What is the E∘ of the cell Zn|Zn2+||Sn2+|Sn in volt?

The correct option is A -0.6Zn|Zn2+||Sn2+|SnZn2+→Zn; SRP=0.74VSn2+→ Sn; SRP=0.14V∴Zn|Zn2+||Sn2+|SnReactoin is : Sn2++Zn→Zn2++Sn∴ Electrical potential =Ecath−Eanode=0.14−0.74=−0.6 VOption A is correct.

Standard reduction potentials of $S n^{2 +} | S n$ and $Z n^{2 +} | Z n$ electrodes are 0.14V and 0.74 V respectively. What is the $E^{\circ}$ of the cell $Z n | Z n^{2 +} | | S n^{2 +} | S n$ in volt?