Answer the following: Equilibrium constant of the reaction, 2Cu(aq)+→Cu(aq)2++Cu(s) is 1.2 × 106. What is the standard potential of the cell in which the reaction takes place? - Chemistry

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Sum

Answer the following:

Equilibrium constant of the reaction,

`2"Cu"_(("aq"))^+ -> "Cu"_(("aq"))^(2+) + "Cu"_(("s"))` is 1.2 × 106.

What is the standard potential of the cell in which the reaction takes place?

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Solution

Given: Equilibrium constant of the reaction (K) = 1.2 × 106.

To find: Standard potential of cell `("E"_"cell"^circ)`

Formulae: `("E"_"cell"^circ) = (0.0592 "V")/"n"  log_10 "K"`

Calculation:

For the given reaction, n = 1.

Using formula,

`("E"_"cell"^circ) = 0.0592/1 xx log_10 (1.2 xx 10^6)`

`("E"_"cell"^circ) = 0.0592 xx (6.079)` = 0.36 V

The standard cell potential of cell is 0.36 V.

Concept: Thermodynamics of Galvanic Cells
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Chapter 5: Electrochemistry - Exercises [Page 118]

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Balbharati Chemistry 12th Standard HSC for Maharashtra State Board
Chapter 5 Electrochemistry
Exercises | Q 4.04 | Page 118
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