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Give a reason to support that sulphuric acid is a dehydrating agent. |
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Answer» Solution :Sulphuric acid is highly soluble in water and has STRONG affinity TOWARDS water and hence it can be used as a dehydrating agent. When dissolved in water it FORMS mono `(H_(2)SO_(4).H_(2)O)` and di `(H_(2)SO_(4).2H_(2)O)` hydrates and the reaction is exothermic. The dehydration property can also be illustrated by its reaction with organic compounds such as sugar, OXALIC acid and formic acid. `underset(("Sucrose"))(C_(12)H_(22)O_(11))+H_(2)SO_(4) rarr 12C+H_(2)SO_(4).11H_(2)O` `underset(("Formic acid"))(HCOOH)+H_(2)SO_(4) rarr CO+H_(2)SO_(4).H_(2)O` `underset(("Oxalic acid"))((COOH)_(2))+H_(2)SO_(4) rarr CO+CO_(2)+H_(2)SO_(4).H_(2)O` |
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