2. Rahman's grandmother has given him a lot of jewellery made from impure silver that consists of 70% silver and the remaining 30% includes copper (25%), zinc (3%), gold (1%), other metal (1%). Most of the jewellery has been broken and the design is out of date. Rahman intends to obtain pure silver in order to be sold at higher prices. (a) With the aid of a diagram, outline the steps to purify the impure silver. (10) (b) Describe the observations and the electrolysis process that occurs in (a). (10) -20) (Total /