Chapter 19, Problem 127A

Interpretation Introduction

Interpretation : The grams of potassium chloride are to be calculated.

Concept Introduction : Molarity is the number of moles of solute dissolved in one liter of solution. It is also known as molar concentration.

Answer to Problem 127A

The gram of potassium chloride is $\text{2}\text{.25}\text{g}$ .

Explanation of Solution

The volume of potassium chloride is $\text{45}\text{mL}$ .

The mass of potassium chloride by solution is $\text{5\%}$ .

The mass of grams of potassium chloride is calculated as shown below:

  $\begin{array}{c}\frac{\text{m}}{\text{V}}\text{=}\text{solution\%}\\ \frac{\text{m}}{45\text{mL}}=5\%\\ \text{m}\text{=}\frac{5}{100}\times 45\\ \text{=}\text{2}\text{.25}\text{g}\end{array}$