Chapter 16, Problem 16.34A

Interpretation Introduction

Interpretation:

Whether any precipitate will form or not must be determined when ${\text{FeSO}}_{\text{4}}$ and ${\text{MnSO}}_{\text{4}}$ solutions are mixed with a buffer containing ${\text{NH}}_{\text{4}}\text{Cl}$ and ${\text{NH}}_{\text{3}}$.

Concept introduction:

• For precipitation of salt ionic product should be greater than solubility product.
• Using the strategy of common ion effect particular ion can be selectively precipitated from a mixture of ions.

Given:

Mmol of ${\text{FeSO}}_{\text{4}}$ solution, mmol of ${\text{MnSO}}_{\text{4}}$ solution and concentration of ${\text{NH}}_{\text{4}}\text{Cl}$ and ${\text{NH}}_{\text{3}}$ in buffer as $\text{0}\text{.2 M}$.