Question

A student uses dry litmus and wet litmus paper to test HCl gas evolved in an experiment. Suggest which litmus paper shows a change. Justify your suggestion

Answer 1

Explanation:

The colour of blue litmus paper changes only in the presence of ions like hydrogen (H+) or hydronium (H3O+) ions. HCl can produce these ions only when in the form of aqueous solution. Hence dry HCl gas does not change the colour of dry litmus paper.

Answer 2

Answer:

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Explanation:

The colour of blue litmus paper changes only in the presence of ions like hydrogen (H+) or hydronium (H3O+) ions. HCl can produce these ions only when in the form of aqueous solution. Hence dry HCl gas does not change the colour of dry litmus paper.