Question

Write Nernst equation for the reaction at 25°C :
2 Al (s) + 3 Cu2+ (aq) —-> 2 Al3+ (aq) + 3 Cu (s)​

Answer 1

Answer:

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Answer 2

Answer:

The Nernst equation is a chemical thermodynamical relationship used in electrochemistry that enables the determination of a reaction's reduction potential from the standard electrode potential, absolute temperature, the number of involved electrons in the oxido-reduction reaction, and the activities of the chemical species undergoing reduction and oxidation, respectively.

Explanation:

The given reaction at 25 °C is as follows below:

                 2 Al (s) + 3 Cu2+ (aq) —-> 2 Al3+ (aq) + 3 Cu (s)​

The Nernst equation in a general form can be written as:

E$_{cell}$ = E°$_{cell}$ - $\frac{0.0591}{n}$ log $\frac{[Oxidised]}{[Reduced]}$

E$_{cell}$ = E°$_{cell}$ - $\frac{0.0591}{n}$ log $\frac{[Al^{3+}]^{2} }{[Cu^{2+} ]^{3} }$

E$_{cell}$ = E°$_{cell}$ - $\frac{0.0591}{6}$ log $\frac{[Al^{3+}]^{2} }{[Cu^{2+} ]^{3} }$

Hence, the Nernst equation for the reaction at 25°C is E$_{cell}$ = E°$_{cell}$ - $\frac{0.0591}{6}$ log $\frac{[Al^{3+}]^{2} }{[Cu^{2+} ]^{3} }$.

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