The electrochemical cell shown below is a concentration cell.
M | M2+ (saturated solution of a sparingly soluble salt, MX2) || M2+ (0.001 mol dm–3) | M
The emf of the cell depends on the difference in concentrations of M2+ ions at the two electrodes. The emf of the cell at 298 K is 0.059 V.
The value of ΔG (kJ mol–1) for the given cell is (take 1 F = 96500 C mol–1)
(1) –5.7
(2) 5.7
(3) 11.4
(4) –11.4
