a) (i) What is a fuel cell? (ii) Using an example, explain how a fuel cell works. b) (i) What is a concentration cell? (ii) Briefly explain how a concentration cell operates. (iii) Calculate the Ecell of the following concentration cell. Mgo/Mg (0.48M) // Mg 4NH +302N+ 6HOm c) Consider the oxidation of ammonia (i) Calculate the AG for the reaction (0.62M)/Mgo (1 mark) (3 marks) (1 mark) (2 marks) (2 marks) (3 marks) (ii) If this reaction were used in a fuel cell what would be the standard cell potential be?... (2 marks)