Question

What is the mass of NaCl required to make 140 grams of a 12% solution of NaCl in water?

Answer 1

Answer: The mass of NaCl required to make 140 grams of a 12% solution of NaCl in water is 17 g.

Explanation:

Given: Mass of solution = 140 g

Mass percent = 12%

Formula used to calculate grams of solute are as follows.

$Grams of solute = \frac{grams of solution \times mass percent}{100 percent}$

Substitute the values into above formula as follows.

$Grams of solute = \frac{grams of solution \times mass percent}{100 percent}\\= \frac{140 g \times 12 percent}{100 percent}\\= 16.8 g\\= 17 g$

Thus, we can conclude that the mass of NaCl required to make 140 grams of a 12% solution of NaCl in water is 17 g.