In a solution with a volume of 200 ml with a mass fraction of hydrogen chloride of 20% dissolved 11.2

In a solution with a volume of 200 ml with a mass fraction of hydrogen chloride of 20% dissolved 11.2 liters of hydrogen chloride, calculate the mass fraction of hydrogen chloride in the resulting solution.

Let’s find how much hydrogen chloride is in the solution.

200 ml – 100%,

x ml – 20%,

x = (200 ml × 20%): 100 = 40 ml.

Find the volume of the solution after adding 11.2 L of HCl.

0.2 l + 11.2 l = 11.4 l.

m (substance) = 0.04 l + 11.2 l = 11.24 l.

w (НCl) = V (substances): V (solution) × 100%,

w (HCl) = (11.24 L: 11.4 L) × 100% = 98.6%.

Answer: 98.6%.