Question

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

Answer 1

Answer:

The presence of hydrogen ions (H+) or hydronium ions (H3O+) in an aqueous solution of acid are responsible for conducting electricity. For example; hydrochloric acid (HCl) dissociates in aqueous solution and gives hydrogen ions [H +(aq)] and chloride ions [Cl-(aq)] which carry electric current. So, due to the presence of these ions, an aqueous solution of hydrochloric acid conducts electricity.

H2O(l)+HCl(l) → H3O+(aq) +Cl-(aq)

JAI SHREE RAM

Answer 2

Answer:

Colour of the litmus paper is changed by the hydrogen ions. Dry HCl gas does not contain H+ ions. ... Since in this case, neither HCl is in the aqueous form nor the litmus paper is wet, therefore, the colour of the litmus paper does not change.

Explanation:

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