During the electrolysis of copper (II) sulphate solution using platinum as cathode and carbon as anode:
i) What do you observe at the cathode and at the anode?
(ii) what change is noticed in the electrolyte?
(iii) write the reaction at the cathode and at the anode?
i) Red metal copper deposits at the cathode and colourless odourless gas oxygen at the anode.
ii) The blue colour of copper sulphate solution soon fades.
iii) At cathode: Cu2+ +2e----> Cu
At anode: OH -----> OH+e-
4[OH]-----> 2H2O +O2
Differentiate between electrical conductivity of copper sulphate solution and copper metal.
Answer the following question:
Name a metal which is found abundantly in the earth’s crust.
Answer the following question:
Write the chemical formulae of one main one of iron and aluminium.
Answer the following question:
Write the constituents of electrolyte for the extraction of aluminium
Given a reason as to why?
The electrolysis of acidulated water is considered to be an example of catalysis.
Write the balanced chemical equation for each of the following reaction:
Sodium thiosulphate is reacted with dilute hydrochloric acid.
What would you observe in the following case?
When carbon monoxide is passed over heated copper oxide.