Question

How does concentration affect EMF?

Answer 1

Concentration cells operate by moving electrons from the lower concentration cell to the higher concentration cell to maintain equilibrium.

Effect of concentration on EMF-

• Using the Nernst equation, electrode potential differentiation between two half-cells can be determined, When electrons move from lower concentration to higher concentration cell to maintain equilibrium concentration cell operate.
• if we change the concentration in the cell of one solution would increase the cell's voltage potential as we bring the device further out of equilibrium, the gradient of concentration is steeper across both sides of the cell since concentration on only one side is increased.