Question

explain why sulphuric acid cannot be prepared from sulphate salt.​

Answer 1

Answer:

Sulfuric acid is a colorless oily liquid. It is soluble in water with release of heat. It is corrosive to metals and tissue.

Answer 2

Explanation:

HI cannot be prepared by the action of conc. H

2

SO

4

on KI because H

2

SO

4

is an oxidising agent and HI is strong reducing agent.

HI reduces sulphuric acid to sulphur dioxide and itself is oxidised to iodine.

KI+H

2

SO

4

→KHSO

4

+HI

H

2

SO

4

+2HI→SO

2

+I

2

+2H

2

O

Hence, HI is prepared by heating KI with conc. phosphoric acid. Same is true for the preparation of HBr.