The emf of a concentration cell gradually decreases.justify ?
Answers
Answer:
Conversely, if the concentrations of products increase relative to reactants, the emf decreases. As voltaic cell operates, reactants are converted into products, which increases the value of Q and causes the emf to decrease.
Answer:
The answer to your question is provided below.
Explanation:
What exactly do you mean by a concentration cell?
A concentration cell can be defined as an electrolytic cell that is made up of two half-cells that share the same electrodes but possess different concentrations. When a concentration cell reaches equilibrium, it dilutes the more concentrated solution and concentrates the more dilute solution, generating a voltage.
How does concentration play an important role in the rise or fall of an emf?
When reactant concentrations are higher than product concentrations, the cell reaction becomes more spontaneous, and the emf rises. But contrary to it, when product concentrations rise above reactant concentrations, the emf falls.