1.54 describe experiments to investigate electrolysis, using inert electrodes, of aqueous solutions such as sodium chloride, copper(II) sulfate and dilute sulfuric acid and predict the products

Electrolysis

Aqueous Solutions

1. Use inert electrodes like platinum or carbon
2. Place them the aqueous solution in a beaker
3. Put a current through the solution
4. Watch as the products are formed

Predicting the products

The positive ions will always go to the negative electrode and vice versa. 

From that we can see what we will see at each electrode.

e.g.

2Cl^- --> Cl₂ + 2e- 

This means that 2 Chloride ions have lost electrons (oxidation) and formed Cl₂ and 2 electrons which will go and be used at the other electrode.