Mass fraction of hydrochloric acid in the solution obtained by dissolving 224 liters

| September 14, 2021 | education

Mass fraction of hydrochloric acid in the solution obtained by dissolving 224 liters. of hydrogen chloride in 2 liters of water is equal to?

From the condition it is known that the mass fraction of HCl (hydrochloric acid) in a solution obtained by dissolving 224 liters (at n.a.) of hydrogen chloride in 2 liters of water is ___%?

First of all, let’s find the mass of hydrogen chloride, for this we multiply the molar mass by the amount of the substance, and to find the amount of the substance, divide the volume by the molar volume:

w (solution HCl) = V / m = 224 / 22.4 = 10 mol.

m = molar mass * amount of substance = 36.5 * 10 = 365 grams.

Since the p (density) of water is 1, we can say that 2 liters of water = 2 kg.

The mass of the resulting solution is 2,000 grams + 365 grams = 2 365 grams.

mass fraction of hydrogen chloride = 365 grams / 2 365 grams = 0.1543 or 15.43%.



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