Chapter 20, Problem 20.59SP

Interpretation Introduction

Interpretation:

How given complex $Cr{\left(\text{OH}\right)}_{\text{3}}$ acts as both acid and base has to be explained.

Concept Introduction:

Lewis acid: The chemical species which accepts pair of electrons are termed as Lewis acid.

Lewis base: The chemical species which donates pair of electrons are termed as Lewis base.

Acid: The substances that donates ${\text{H}}^{\text{+}}$ are termed as acids.

Base: The substances that accepts ${\text{H}}^{\text{+}}$ or donates ${\text{OH}}^{\text{-}}$ are termed as base.

Amphoteric: They are compounds or ions that reacts with both acid and base. Example ${\text{Al}}_{\text{2}}{\text{O}}_3$.