If the standard reduction potentials of Zn, N | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) For a reaction to be spontaneous, the standard cell potential $E^\circ_{	ext{cell}}$ must be positive.$E^\circ_{	ext{cell}} = E^\circ_{	ext{cat

Vedclass · Accepted Answer

$X = Zn, Y = Ni$

Vedclass · Answer

(D) For a reaction to be spontaneous, the standard cell potential $E^\circ_{	ext{cell}}$ must be positive.$E^\circ_{	ext{cell}} = E^\circ_{	ext{cathode}} - E^\circ_{	ext{anode}} = E^\circ_{Y^{+2}/Y} - E^\circ_{X^{+2}/X} > 0$.This implies $E^\circ_{Y^{+2}/Y} > E^\circ_{X^{+2}/X}$.Given potentials: $E^\circ_{Zn^{+2}/Zn} = -0.76 	ext{ V}$, $E^\circ_{Fe^{+2}/Fe} = -0.44 	ext{ V}$, $E^\circ_{Ni^{+2}/Ni} = -0.23 	ext{ V}$.Checking option $(D)$: $X = Zn$ $(E^\circ = -0.76 	ext{ V})$ and $Y = Ni$ $(E^\circ = -0.23 	ext{ V})$.$E^\circ_{	ext{cell}} = (-0.23) - (-0.76) = +0.53 	ext{ V}$.Since $E^\circ_{	ext{cell}} > 0$, the reaction is spontaneous.

If the standard reduction potentials of $Zn$, $Ni$, and $Fe$ are $-0.76 \text{ V}$, $-0.23 \text{ V}$, and $-0.44 \text{ V}$ respectively, determine the electrodes $X$ and $Y$ for the reaction $X(s) + Y^{+2}_{(aq)} \rightarrow X^{+2}_{(aq)} + Y(s)$ to be spontaneous.

Similar Questions

Zinc can be coated on iron to produce galvanized iron,but the reverse is not possible. This is because:

What is the standard cell potential for the cell $Zn | Zn^{2+} (1M) || Cu^{2+} (1M) | Cu$? Given $E^o$ for $Zn^{2+} | Zn = -0.76 \ V$ and $E^o$ for $Cu^{2+} | Cu = +0.34 \ V$.

Which of the following has been universally accepted as a reference electrode at all temperatures and has been assigned a value of zero volt?

$A$ solution contains $Fe^{2+}$,$Fe^{3+}$ and $I^{-}$ ions. This solution was treated with iodine at $35^{\circ}C$. $E^{\circ}$ for $Fe^{3+}/Fe^{2+}$ is $+0.77 \ V$ and $E^{\circ}$ for $I_2/2I^{-}$ is $+0.536 \ V$. The favourable redox reaction is

The standard reduction potentials of $Cu^{2+}$,$Zn^{2+}$,$Sn^{2+}$ and $Ag^{+}$ are $0.34 \ V$,$-0.76 \ V$,$-0.14 \ V$ and $0.80 \ V$ respectively. Which of the following solutions can be stored in the given vessel without any reaction occurring (under standard conditions)?

Vedclass Test Series

Exam Paper Generator

Online Exam Module