Chapter 16, Problem 16.21P

(a)

Interpretation Introduction

Interpretation:

When potassium permanganate were pure, the theoretical molarity of the solution has to be calculated and if none was consumed by impurities.

Concept introduction:

Molarity (M):

Molarity is one of the concentration unit.  Molarity is defined as number of moles of the solute in one litre of solution.

$\text{Molarity =}\frac{\text{Number of moles of the solute}}{\text{1L solution}}$

(b)

Interpretation Introduction

Interpretation:

Mass of Arsenic(III) trioxide   $\left({\text{As}}_{\text{4}}{\text{O}}_{\text{6}}\right)$ will be enough to react with $\text{25}{\text{.00 mL of KMnO}}_4$ has to be calculated.

(c)

Interpretation Introduction

Interpretation:

Molarity of Permanganate solution has to be calculated.

Concept introduction:

Molarity (M):

Molarity is one of the concentration unit.  Molarity is defined as number of moles of the solute in one litre of solution.

$\text{Molarity =}\frac{\text{Number of moles of the solute}}{\text{1L solution}}$