Chapter SH, Problem 21.8APP

To determine

To calculate: Mass of sodium chloride as a percentage of the mass of the solution.

Answer to Problem 21.8APP

Mass of sodium chloride as a percentage of the mass of the solution is $\underset{\_}{35.9\%}$ .

Explanation of Solution

Given:

Solubility of sodium chloride in water = $\text{35}\text{.9 g/100 mL}$

Amount of water = $\text{500 mL}$

Calculation:

  $\text{100 mL}$ of water dissolves $35.9\text{ g}$ of sodium chloride.

  $\text{1 mL}$ of water dissolves $\frac{\text{35}\text{.9 g}}{100\text{ mL}}$ of sodium chloride.

  $\text{500 mL}$ of water dissolves $\frac{\text{35}\text{.9 g}}{100\text{ mL}}\times 500\text{ mL = 179}\text{.5 g}$ of sodium chloride.

Mass of sodium chloride as a percentage of the mass of the solution is calculated as:

  $\frac{179.5}{500}\times 100=35.9\%$

Conclusion:

Mass of sodium chloride as a percentage of the mass of the solution is $\underset{\_}{35.9\%}$ .