Question

2
22. A sodium chloride solution is 15.0% m/m%. Calculate mass of sodium chloride in 219 g solution.
14.2g
80.38
11.2 g
32.9 g

Answer 1

Answer: The mass of sodium chloride in 219 g solution is 32.9 g

Explanation:

To calculate the mass percent of element in a given compound, we use the formula:

$\text{Mass percent of A}=\frac{\text{Mass of A}}{\text{mass of A +mass of B}}\times 100$

To find mass of sodium chloride in solution:

$\text{Mass percent of sodium chloride}=\frac{\text{Mass of sodium chloride}}{\text{mass of solution}}\times 100$

Mass percent of sodium chloride= 15.0 %

Mass of solution = 219g

$15=\frac{\text{Mass of sodium chloride}}{219}\times 100$

${\text{Mass of sodium chloride}=32.9g$

Thus mass of sodium chloride in 219 g solution is 32.9 g