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Question

(a) Name the process used for the large scale manufacture of sulphuric acid.
(b) Which property of sulphuric acid accounts for its use as a dehydrating agent?
(c) Concentrated sulphuric acid is both an oxidising agent and a non-volatile acid. Write one equation each to illustrate the properties of sulphuric acid mentioned above.

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Solution

(a) The contact process is used for large scale manufacture of sulphuric acid.
(b) Sulphuric acid has great affinity towards water. Therefore, it is used as a dehydrating agent.
(c) Sulphuric acid as an oxidising agent:

S + 2H2SO4 → 2H2O + 3SO2

(d) Sulphuric acid as a non-volatile acid:
NaCl + H2SO4 <2000C NaHSO4 + HCl


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