Engineering Chemistry

Define salt bridge. What is the role of salt bridge? From the given information, answer the following questions. Ni → Ni²⁺ + 2e⁻, E° = 0.24 V; Cd → Cd²⁺ + 2e⁻, E° = 0.40 V; [Ni²⁺] = 0.1 M and [Cd²⁺] = 0.01 M. i) Identify anode and cathode while constructing the galvanic cell with reasons. ii) Write the symbolic representation of the galvanic cell when the above given electrodes are coupled. iii) Calculate the EMF of the galvanic cell at 25°C.