i) What is the name of the process used for the industrial preparation of tetraoxosulphate (VI) acid?

(ii) State the catalyst used in (a)(i)

(iii) Show by means of bdanced chemical equations only, the industrial preparation of tetraoxosulphate (VI) acid from sulphur (IV) oxide.

 

(b)(i) Distinguish between dehydration and drying

(ii) Explain why concentrated tetraoxosulphate (VI) acid cannot be used to dry ammonia

(iii) What is the drying agent for ammonia?

(c)(i) Give one example of I. a chloride which is soluble in hot water, II. a trioxocarbonate (IV) which does not decompose on heating, Ill. an amphoteric oxide

(ii) List three methods for the preparation of salts

(iii) State one method for the recovery of salt from its solution.

 

(d)(i) State Gay Lussac's law of combining volumes

(ii) Consider the reaction represented by the following equation: C\(_2\)H\(_{4(g)}\) + 3O\(_{2(g)}\) \(\to\)  2H\(_2\)O\(_{(g)}\) + 2CO\(_{2(g)}\). What is the volume of oxygen required for the complete combustion of 12.5 cm\(^{3}\) of ethene?