Question

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Explain Why -:

(1) Anhydrous HCl is a poor conductor while aqueous HCl is an excellent conductor.

(2) Dry hydrogen chloride gas does not affect a dry strip of blue litmus paper but it turns red in the presence of a drop of water.

Answer 1

1) because it has ions so as a result the electricity pases through the ions ( h+an and oh-)
2) because in presence of the water molecules only it shows the colour
if u take the wet litmus you will get the colour change

Answer 2

Hope u like my answer
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1) The word anhydrous signifies that the HCl is lack of water.. This can be said that anhydrous acid don't contains OH- and few H+ ions.

Here due to lack of excess hydrogen, the ions of anhydrous HCl behaves as poor conductors rather the aqueous HCl dissociate into many ions such as H+, Cl-, OH-. And is an excellent conductor.

In comparison, we can see that 1 mole of anhydrous contains comparatively less H+ ions than aqueous HCl contains.

More the ions more the conductivity thus more excellent conductor it is.

Thus anhydrous HCl is poor conductor and aqueous is an excellent conductor.

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2)

Dry HCl gas is similar to anhydrous HCl.. Thus it is least acidic..

Being less acidic, it cant be able to affect the dry strip of blue litmus paper red.

But when a single drop of water is provided, the H2O, turns it slightly aqueous and thus it becomes acidic.

So it coming in contact with dry stop of litmus paper it turns it to red.

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