What is the diaphragm for, in the diaphragm cell? 

The electrolysis of brine is a very important process. Explain why. 

The electrolysis of brine is a very important process. Give three uses for each of the products. 

Your job is to keep a brine electrolysis plant running safely and smoothly. Try to think of three or four safety precautions you might need to take. 

Copper$\left(\mathrm{II}\right)$ ions are blue. When copper$\left(\mathrm{II}\right)$ sulphate solution is electrolysed, the blue solution loses its colour when carbon electrodes are used. Explain the observation.  

If you want to purify a metal by electrolysis, will you make it the anode or the cathode? Why?