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Give Reason for the Following: Dilute Hydrochloric Acid Cannot Be Concentrated by Distilling (Boiling) the Dilute Acid. - Chemistry

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Question

Give reason for the following:
Dilute hydrochloric acid cannot be concentrated by distilling (boiling) the dilute acid.

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Solution

Dilute hydrochloric acid cannot be concentrated beyond 22.2% (by weight) by distillation.This is due to the fact that this mixture (77.8%  water+22.2% HCI) is an azeotropic mixture, it boils at a constant temperature of 110°C without any change in concentration.

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Chapter 8: Study of Compounds-I: Hydrogen Chloride - Exercise 4 [Page 201]

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Frank Chemistry Part 2 [English] Class 10 ICSE
Chapter 8 Study of Compounds-I: Hydrogen Chloride
Exercise 4 | Q 4 | Page 201
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