Chapter 22, Problem 50E

Interpretation Introduction

Interpretation:

The mass of ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{2}}$ needs to be determined.

Concept introduction:

The balanced chemical equation is as follows:

${\text{2MnO}}_4^{-}+5{\text{SO}}_3^{2-}+6{\text{H}}^{+}\to 2{\text{Mn}}^{2+}+5{\text{SO}}_4^{2-}+3{\text{H}}_{\text{2}}\text{O}$

Molarity of a solution is expressed as follows:

$\text{Molarity=}\frac{\text{Number}\text{}\text{}\text{of}\text{moles}}{\text{volume}\left(\text{L}\right)}$

Here, number of moles is of solute and volume is of solution in L.

If molarity and volume is given then number of moles is calculate as follows:

$\text{Number}\text{}\text{}\text{of}\text{moles=Molarity×volume}\left(\text{L}\right)$