Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) OH^– (b) F^– (c) H⁺ (d) BCl₃.

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Solution

(a) OH^– is a Lewis base since it can donate its lone pair of electrons.

(b) F^– is a Lewis base since it can donate a pair of electrons.

(c) H⁺ is a Lewis acid since it can accept a pair of electrons.

(d) BCl₃ is a Lewis acid since it can accept a pair of electrons.

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