Chapter 12, Problem 12.EE

(a)

Interpretation Introduction

Interpretation:

The concentration of ${\text{Mn}}^{\text{2+}}$ at the end point should be calculated.

Concept Information:

In the reaction of metal with ligand, the equilibrium constant is called as formation constant or the stability constant.

${\text{MY}}^{\text{n+}}+{\text{Y}}^{\text{4-}}\underset{}{\rightleftharpoons }{\text{MY}}^{\text{n4-}}$

The formation constant for above complex reaction is,

${\text{K}}_{\text{f}}\text{=}\frac{{\text{[M}}^{\text{n+}}{\text{][Y}}^{\text{4-}}\text{]}}{{\text{[MY}}^{\text{n4-}}\text{]}}$

Where,

${\text{K}}_{\text{f}}$ is formation constant

${\text{[M}}^{\text{+}}\text{]}$ is concentration of metal ion

${\text{[Y}}^{\text{4-}}\text{]}$ is concentration of ligand

${\text{[MY}}^{\text{n4-}}\text{]}$ is concentration of the acid

(b)

Interpretation Introduction

Interpretation:

The ${\text{[H}}_{\text{3}}{\text{Y}}^{\text{-}}]/{\text{[H}}_{\text{3}}{\text{Y}}^{\text{2-}}]$ quotient of $\text{63}\text{.7}\text{\%}$ reaction should be calculated.

Concept Information:

In the reaction of metal with ligand, the equilibrium constant is called as formation constant or the stability constant.

${\text{MY}}^{\text{n+}}+{\text{Y}}^{\text{4-}}\underset{}{\rightleftharpoons }{\text{MY}}^{\text{n4-}}$

The formation constant for above complex reaction is,

${\text{K}}_{\text{f}}\text{=}\frac{{\text{[M}}^{\text{n+}}{\text{][Y}}^{\text{4-}}\text{]}}{{\text{[MY}}^{\text{n4-}}\text{]}}$

Where,

${\text{K}}_{\text{f}}$ is formation constant

${\text{[M}}^{\text{+}}\text{]}$ is concentration of metal ion

${\text{[Y}}^{\text{4-}}\text{]}$ is concentration of ligand

${\text{[MY}}^{\text{n4-}}\text{]}$ is concentration of the acid