Chapter 4, Problem 142QP

Interpretation Introduction

Interpretation:

The number of moles of nitrate ions present in $1.0\text{ L}$ of a $2.5\text{ M Mg}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}$ solution is to be determined.

Concept Introduction:

The molarity of a solution is defined as the number of moles of a solute dissolved in per liter of solution. The molarity of the solution is determined by the following expression:

$M=\frac{n}{V}$ …… (1)

Here, $n$ is the number of moles of solute, $V$ is the volume of the solution in liters, and $M$ is the molarity of the solution.

Rearrange equation (1) in terms of number of moles of solute as follows:

$n=M\times V$ …… (2)