Chapter 8, Problem 72P

Interpretation Introduction

(a)

Interpretation:

The concentration of solution D formed after the dilution of solution C is to be determined.

Concept introduction:

In accordance with the Law of conservation of mass, for a chemical reaction the sum of the mass of all the reactants is equal to the sum of the mass of all the products.

When a solution is diluted the number of moles and therefore the number of atoms of each of the species of the solute remains constant. This is in accordance with law of conservation of mass. Mathematically, this can be expressed as follows:

  $\text{Number of moles}=\text{Molarity}\times \text{Volume}$

This can also be rewritten as follows:

  $\text{MV}=\text{constant}$

Interpretation Introduction

(b)

Interpretation:

Volume of water that has been added to solution C to form solution D is to be determined.

Concept introduction:

The dilution formula is given as follows:

  ${\text{M}}_1{\text{V}}_1={\text{M}}_2{\text{V}}_2$