Question

Consider the following reaction:
AgBr(s) + 2CN- (aq) ----> Ag(CN), (aq) + Br (aq)

The species that are acting as a Lewis acid and Lewis base, respectively, are

(a) AgBr and Ag(CN)2^-
(b) Ag(CN)2^- and Ag+
(c) Ag+ and Br-
(d) Br- and CN-
(e) Ag+ and CN-

answer is e but pls explain
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Answer 1

Dear Student,

◆ Answer -

(e) Ag+ and CN-

● Explaination -

Lewis' theory states that an acid is a species that accepts an electron pair while a base donates an electron pair.

Equation of reaction between AgBr and CN- is given as -

AgBr(s) + 2CN-(aq) --> AgCN(aq) + Br-(aq)

Here, Ag+ from AgBr accepts electron pair making it Lewis base. This electron pair is donated by CN- making it Lewia base.

Thanks dear. Hope this helps you..