Explanation Given information: The given species are: ( a ) NH 3 , ( b ) NH 4 + , ( c ) OH − , ( d ) O 2 − , ( e ) HF, and ( f ) F − . Reason for correct options: In NH 3 , there is a proton available to be donated, and also a lone pair of electrons to form bonds with the accepted proton. Thus, NH 3 is amphoteric and can undergo autoionization according to the reaction: NH 3 ( a q ) + NH 3 ( a q ) ⇌ NH 4 + ( a q ) + NH 2 − ( a q ) Thus, option (a) is correct. In OH − , there is a proton available to be donated and also a lone pair of electrons to form bonds with the accepted proton

4th Edition

ISBN: 9780078021527

Author: Julia Burdge

Publisher: McGraw-Hill Education

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Chapter 16, Problem 19QP

Interpretation Introduction

Interpretation:

All the given species that can undergo auto-ionization are to be identified.

Concept introduction:

Any species that can act as either an acid or a base depending on the reaction conditions are called amphoteric.

An amphoteric species, when present alone in a solution, can undergo self-ionization and can react with its own molecule. This is called auto-ionization.

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Solution Summary: The author explains that any species that can act as either an acid or a base depending on the reaction conditions are called amphoteric.

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