Chapter 16, Problem 16.11P

Interpretation Introduction

Interpretation:

The reason why ${\text{Cr}}^{\text{3+}}$ and ${\text{TiO}}^{\text{2+}}$ do not affect in the analysis of ${\text{Fe}}^{\text{3+}}$ when Walden redactor instead of Jones reductor has to be explained

Concept introduction:

Reductor: Reductor is a column which is packed with a solid reagent used for prereduction of titrant.

Jones reductor is a reductor which contains zinc coated with zinc amalgam. Amalgamis nothing but mercury contains solution of anything.  Jones redactor is not selective.

Jones reduction is prereduction method uses column is filled with reducing agent in the form of solid.

Walden reductor: The reductor which contains solid silver and $\text{1M}\text{HCl}$.  It is more selective.