Chapter 19, Problem 109IL

Interpretation Introduction

Interpretation:

The equation between ${\text{KI and Cu(NO}}_{\text{3}}{\text{)}}_{\text{2}}$ has to be determined.

Concept introduction:

Oxidation reaction:

The loss of electrons or the gain of oxigen atoms.And also increase their oxidation number.

$\text{Ag }\to {\text{ Ag}}^{\text{+}}{\text{+ e}}^{\text{-}}$

In the above reaction , Ag atom lose one electron and change their oxidation state 0 to 1.

Reduction reaction:

Gaining electrons or adding hydrogen atoms. And also decrease their oxidation number.

${\text{Fe}}^{\text{2+}}{\text{+2e}}^{\text{-}}\to \text{ Fe}$

In the above reaction ${\text{Fe}}^{\text{2+}}$ ion gaining 2 electrons and reduce their oxidation number +2 to 0.