(e) Name the anode and the cathode used in the electrolytic refining of impure copper metal.

Solution:

(d) Because sodium chloride is an ionic compound, it has a high melting point. Ionic compounds are made up of electrically charged species called ions, which are positive and negative ions. There is a powerful pull of attraction that is tough to break and demands a lot of work to do so.

(e) Cathode: Thin strip of pure copper metal; Anode: Thick block of impure copper metal.