Question

An aqueos solution of hcl contains no oh ions .Is it true cbse

Answer 1

value of dissociation constant, K comes to

         K = [H+] [OH-]/[H2O]

        or   [H+][OH-] = K[H2O]

Since dissociation takes place to a very small extent, the concentration of undissociated water molecules, [H20], may be regarded as constant. Thus, the product #[H20] gives another constant which is designated as Kw. So,

[H+][OH-] = Kw

The constant, Kw, is termed as ionic product of water.

Refer to the following video for ionic product of water

It is only because of the self ionization of water that it can act as both acid as well as base.

Any substance which increases the concentration of H+ ion would make water acidic.

Similarly, any substance which increases the concentration of OH- ion, would make water basic.

But in pure water, the hydrogen ion (hydroxonium ion) concentration is always equal to the hydroxide ion concentration. For every hydrogen ion formed, t

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