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%.
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