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Describe an Experiment to show hygroscopic nature of concentrated sulphuric acid

Describe an Experiment to show hygroscopic nature of concentrated sulphuric acid.

Answers

Kavungya
(i). Procedure
- A small beaker half full of conc. H2SO4 is weighed.
- Level of acid in beaker is marked to the outside using gummed paper.
- Acid is left exposed to air for a week or so then weighed again and level also noted.

(ii). Observations
- There is an increase in weight of acid.
- Level of acid in beaker is now above the paper mark.

(iii). Explanations
- The increase in weight and size is due to water absorbed form the air by the conc. sulphuric (VI) acid.
Note:
- This explains why sulphuric (VI) acid is used as a drying agent.
Kavungya answered the question on April 29, 2019 at 12:33

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