Answer to Question #150146 in General Chemistry for heni

Question

A solution contains 1.5 g sodium chloride in 100.0 g water. What is the percentage by mass of NaCl in the solution?

Answer 1

Solutions:

Mass of chemical = Mass of sodium chloride = 1.5g

Mass of water = 100.0g

Total Mass of the compound = ?

Note that the total mass of the compound is the amount of sodium chloride plus (+) the amount of water.

Total mass = 1.5g + 100.0g

Total mass = 101.5g

Formula for mass percentage = (mass of chemical / total mass of compound) × 100%

Mass percentage = (1.5g / 101.5g) × 100%

Mass percentage = 0.0147783 × 100%

Mass percentage = 1.4778%

Thus, the percentage by mass of sodium chloride contained in 100.0g of water is 1.4778%