Chapter 12, Problem 12.CE

Interpretation Introduction

Interpretation:

${\text{pCu}}^{\text{2+}}$ at given points has to be calculated, from the given titration if ${\text{Cu(NO}}_{\text{3}}\text{)}$ with $\text{EDTA}$ and the graph between ${\text{pCu}}^{\text{2+}}$ and volume should be drawn.

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