Explain redox reaction of electrodes with example of denied cell.
Daniell Cell is designed to make use of the spontaneous
redox reaction between zinc and cupric ions to produce an electric current. It
has two half-cells. The half-cells on the left side contains a zinc metal electrode dipped in ZnSO4
solution. The half-cell on the right consists of copper metal electrode in a
solution CuSO4. The half-cells are joined by a salt bridge that prevents
the mechanical mixing of the solution.When the zinc and copper electrodes are
joined by wire, the following observations are made: There is a flow of electric current through
the external circuit. The zinc rod loses
its mass while the copper rod gains in mass.The concentration of ZnSO4
solution increases while the concentration of copper sulphate solution
decreases.The solutions in both the compartments remain electrically neutral.
Daniell Cell is designed to make use of the spontaneous redox reaction between zinc and cupric ions to produce an electric current. It has two half-cells. The half-cells on the left side contains a zinc metal electrode dipped in ZnSO4 solution. The half-cell on the right consists of copper metal electrode in a solution CuSO4. The half-cells are joined by a salt bridge that prevents the mechanical mixing of the solution.When the zinc and copper electrodes are joined by wire, the following observations are made: There is a flow of electric current through the external circuit. The zinc rod loses its mass while the copper rod gains in mass.The concentration of ZnSO4 solution increases while the concentration of copper sulphate solution decreases.The solutions in both the compartments remain electrically neutral.
