Chapter 12, Problem 12.5YT

Interpretation Introduction

Interpretation:

The grams of $\text{NaF}$ present in given amount of $0.78\text{M}-\text{NaF}$ solution are to be determined.

Concept Introduction:

Molarity is defined as the number of moles of solute per liter of solution. Mathematically, molarity $\left(\text{M}\right)$ is calculated as:

$\text{Molarity}\left(\text{M}\right)=\frac{\text{Moles solute}}{\text{Liters solution}}$

The volume of solution should be in liters and the unit of molarity is $\text{M}$.

The relation between the numbers of moles $\left(n\right)$ and molar mass is:

$n=\frac{m}{\text{molar mass}}$

Here, $m$ is mass.

The molar mass of $\text{NaF}$ is calculated as:

$\text{Molar mass of NaF}=\text{ atomic mass of Na + atomic mass of F}$