Chapter 11, Problem 11.49SP

(a)

Interpretation Introduction

Interpretation:

The preparation of given $\text{ppm}$ solution of Urea in water has to be given.

Concept introduction:

The Parts per million ($\text{ppm}$) of a compound can be defined as the ratio taken by the calculated mass to the total mass of a compound by ${10}^6$.  It can be given by the formula

$\text{Parts per million }\left(\text{ppm}\right)\text{=}\frac{\text{Mass of component}}{\text{Total mass of solution}}\text{×}\text{100\%}$

(b)

Interpretation Introduction

Interpretation:

The aqueous solution of given molarity of ${\text{K}}^{\text{+}}$ concentration in water has to be prepared.

Concept introduction:

The concentration of solution can be defined in terms of molarity as the moles of the solute to the volume of the solution.

$\text{Molarity}\text{(in}\text{M)}\text{=}\frac{\text{moles}\text{of}\text{solute}\text{(in}\text{moles)}}{\text{volume}\text{of}\text{solution}\text{(in}\text{litres)}}$