Galvanic Cells

The standard EMF (

E_%7B%5Ctext%7Bcell%7D%7D%5E%5Ccirc

) of a Galvanic cell is given by the equation:

E_%7B%5Ctext%7Bcell%7D%7D%5E%5Ccirc%20%3D%20E%5E%5Ccirc_%7B%5Ctext%7Bcathode%7D%7D%20-%20E%5E%5Ccirc_%7B%5Ctext%7Banode%7D%7D.

In this case, the cathode will be the electrode with the more positive electrode potential, and the anode will be the electrode with the more negative electrode potential.
Given:
-

E%5E%5Ccirc_%7B%5Ctext%7BA%7D%7D%20%3D%20-0.25%20%5C%2C%20%5Ctext%7BV%7D

,
-

E%5E%5Ccirc_%7B%5Ctext%7BB%7D%7D%20%3D%20-0.76%20%5C%2C%20%5Ctext%7BV%7D

.
Thus, the anode will be electrode-B (more negative), and the cathode will be electrode-A.

E_%7B%5Ctext%7Bcell%7D%7D%5E%5Ccirc%20%3D%20(-0.25)%20-%20(-0.76)%20%3D%200.51%20%5C%2C%20%5Ctext%7BV%7D.

Therefore, the standard EMF of the cell is

0.51%20%5C%2C%20%5Ctext%7BV%7D

, and electrode-A will act as the anode.

High-Yield Trend

Chapter Questions
1 MCQs

Official Solution

Galvanic Cells

High-Yield Trend

Chapter Questions 1 MCQs

Official Solution

Chapter Questions
1 MCQs