Chapter 7, Problem 7.38UKC

(a)

Interpretation Introduction

Interpretation:

The weight/volume percentage of the solution has to be calculated.

Concept Introduction:

Weight/volume percent:  Weight/volume percent is defined as the concentration expressed in terms of grams of solute dissolved in volume of solution.  Weight/volume percent is given as,

  $\left(\text{w/v}\right)\text{\%=}\frac{\text{Mass}\text{of}\text{solute(in}\text{g)}}{\text{Volume}\text{of}\text{solution}\left(\text{in}\text{mL}\right)}\text{×100\%}$

(b)

Interpretation Introduction

Interpretation:

The concentration of the solution has to be calculated.

Concept Introduction:

Molarity:  Molarity is defined as the mass of solute in one liter of solution.  Molarity is the preferred concentration unit for stoichiometry calculations.  The formula is,

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

Concentration of the solution is calculated using the formula,

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

${\text{C}}_{\text{1}}\text{=}$ Initial concentration of the solution

${\text{V}}_{\text{1}}\text{=}$ Initial volume of the solution

${\text{C}}_{\text{2}}\text{=}$ Final concentration of the solution

${\text{V}}_{\text{2}}\text{=}$ Final concentration of the solution