Why does dey HCL does not change colour to dry litmus paper?
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Hi friend.This is your answer
The colour of litmus paper changes only in the presence of ions like hydrogen (H+) or hydronium (H3O+) ions. HCl can produce these ions only in the form of aqueous solution. Hence dry HCl gas does not change the colour of dry litmus paper.
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The colour of litmus paper changes only in the presence of ions like hydrogen (H+) or hydronium (H3O+) ions. HCl can produce these ions only in the form of aqueous solution. Hence dry HCl gas does not change the colour of dry litmus paper.
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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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