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Why does dry HCl gas not change the colour of the dry litmus paper?

Why does dry HCl gas not change the colour of the dry litmus paper?

Grade:12

2 Answers

Harshit Singh
askIITians Faculty 5963 Points
one year ago
Dear Student

Dry HCl gas does not release H+ions and hence, the acidic property of gas is not imparted.
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Thanks
KAPADIA DEV
100 Points
one year ago

We know that the colour of litmus paper is changed by H + ions because of acid.

Dry HCL it does not dissociate to give H+ ions.

Acids dissociate to give ions only in the aqueous solution.

In this HCL is not in aqueous form nor litmus paper is wet, so the colour of litmus paper does not change.

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