Write the modern definition of acid and base. Explain it by giving one example of each?

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Solution

An acid is a species that can accept a share in an electron pair. A base is a
species that can donate a share in an electron pair.
$F_{3} B + : N H_{3} \to F_{3} B \leftarrow N H_{3}$
$N H_{3}$ donates a share in an electron pair. Hence, $N H_{3}$ is base.
$F_{3} B$ accepts a share in an electron pair. Hence, $F_{3} B$ is an acid.

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Write the modern definition of acid and base. Explain it by giving one example of each?

An acid is a species that can accept a share in an electron pair. A base is a species that can donate a share in an electron pair. F3B+:NH3→F3B←NH3NH3 donates a share in an electron pair. Hence, NH3 is base.F3B accepts a share in an electron pair. Hence, F3B is an acid.