Question

why is H2O a lewis base?

Answer 1

Hii There!!!


We know that a lewis base is an electron pair donor .

So, in the molecule of H2O it has one lone pair electron.

Hence, in the reaction :-

NH4+(aq) + H2O(l) ⇄ NH3(aq) + H3O+(aq)

Here, water is the Lewis base so H+ is the Lewis acid and it donates H+ on NH+4.

This NH+4 ion accepts that electron pair to make a bond.

NH+4 is then a Bronsted-Lowry acid and it will be a proton donor and water is then also the Bronsted-Lowry base, and will be a proton acceptor.



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