5.6 L of hydrogen chloride was dissolved in 400 g of water. Find the mass fraction of hydrogen

univerkov | March 15, 2021 | education

5.6 L of hydrogen chloride was dissolved in 400 g of water. Find the mass fraction of hydrogen chloride in the resulting hydrochloric acid solution.

1. Find the mass of hydrogen chloride, based on its volume by the formula:

m (HCl) = V * M / Vm = 5.6 * (1 + 35.5) / 22.4 = 9.125 g

2. Find the mass of the resulting solution by the formula:

m (solution) = m (water) + m (salt) = 400 + 9.125 = 409.125 g

3. We calculate the mass fraction of hydrogen chloride in the resulting solution by the formula:

w (solution) = m (HCl) * 100% / m (solution) = 9.125 * 100 / 409.125 = 2.23%.

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