Chapter 7, Problem 7.95SP

Interpretation Introduction

Interpretation:

The required volume (mL) of $\text{0}{\text{.250 M Na}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{3}}\text{solution}$ to completely react with $\text{2}{\text{.486 g of I}}_2$ should be calculated.

Concept introduction:

Redox:

The reduction and oxidation reactions are occur simultaneously with in a single reaction is known as redox reaction.

Redox titration:

Redox titration is type of titration method to determine the amount of analyte that present in the given sample by redox reaction.

The amount of analyte is calculated by volumetric principle, and mass equation they are below,

Volumetric principle:

The volume and concentration of unknown solution is determined by it is titrate with known volume and concentration solution.

The volume and concentration of unknown solution is required equivalent volume and concentration of known solution in the volumetric titration.

${\text{V}}_{\text{1}}{\text{M}}_{\text{1}}\text{=}{\text{V}}_{\text{2}}{\text{M}}_{\text{2}}$

Where,

${\text{V}}_{\text{1}}$ is volume of known solution

${\text{N}}_{\text{1}}$ is concentration of known solution

${\text{V}}_2$ is volume of unknown solution

${\text{N}}_{\text{2}}$ is concentration of unknown solution

Mole:

Mole of the compound present in the solution is calculated by molarity concentration of the compound multiplied with liter volume of solution.

$\text{Mole }\text{= Molarity}\text{× Liter}$

Mass:

Mass of the compound is calculated by mole of the compound is multiplied with molar mass of the compound.

$\text{Mass}\text{=}\text{Molar}\text{mass}\text{×}\text{mole}$