Answer to Question #191305 in Chemistry for Jason

Question

What will be the mass concentration of the HCl solution if 400 cm3 of water is added to 100 cm3 of a solution with a mass concentration of 10 g / dm3?

Answer 1

(100 cm³) × (1dm³ / 1000 cm³) = 0.1 dm³

Solution:

(0.1 dm³ HCl) × (10 g HCl / 1 dm³ HCl) = 1 g HCl

Mass of solute = 1 g HCl

Volume of solution = 400 cm³ + 100 cm³ = 500 cm³ = 0.5 dm³

Mass concentration = Mass of solute / Volume of solution

Therefore,

Mass concentration = (1 g) / (0.5 dm³) = 2 g/dm³

Mass concentration = 2 g/dm³

Answer: The mass concentration of the HCl solution will be 2 g/dm³