Question

Why conc. Sulphuric acid is used as drying agent and dehydrating agent?

Answer 1

sulphuric acid is used as drying agent and dehydrating agent because Sulphuric acid has a great affinity for water. It readily removes elements of water from other compounds i.e, it acts as a dehydrating agent, it being a hygroscopic substance absorb water from other substances without dissolving in it,so it is considered a good dessicating or drying agent. But remember , that only concentrated sulphuric acid is a good dehydrating agent not dilute acid because dilute sulphuric acid itself contains water and will not be able to absorb water from other substances.
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Answer 2

Answer:

conc.sulphuric acid is good drying and dehydrating agent because it has strong affinity for water and can absorb water very quickly.