Question

В 100г воды растворили 22,4л хлороводорода (н.у). Определите массовую долю HCI в полученной соляной кислоте.

Answer 1

Может в полученном растворе????

Answer 2

Calculation of the Mass Fraction of HCl in the Solution

To determine the mass fraction of HCl in the solution, we need to know the mass of HCl and the total mass of the solution.

Given that 22.4 L of HCl gas is dissolved in 100 g of water, we can calculate the mass of HCl using its molar mass and the ideal gas law. The molar mass of HCl is approximately 36.46 g/mol.

Using the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature, we can calculate the number of moles of HCl gas.

Since the pressure and temperature are not provided in the question, we will assume standard conditions (1 atm and 273.15 K) for the calculation.

The volume of the gas is given as 22.4 L, which is equivalent to 22.4/1000 = 0.0224 m^3.

Using the ideal gas law equation, we can calculate the number of moles of HCl gas:

n = PV / RT = (1 atm * 0.0224 m^3) / (0.0821 atm·L/mol·K * 273.15 K) = 0.001 mol

Since the molar mass of HCl is 36.46 g/mol, the mass of HCl in the solution is:

mass of HCl = number of moles * molar mass = 0.001 mol * 36.46 g/mol = 0.03646 g

Now, we can calculate the mass fraction of HCl in the solution:

mass fraction of HCl = (mass of HCl / total mass of solution) * 100%

The total mass of the solution is given as 100 g of water.

mass fraction of HCl = (0.03646 g / 100 g) * 100% = 0.03646%

Therefore, the mass fraction of HCl in the obtained hydrochloric acid solution is approximately 0.03646%.

Please note that the calculation assumes that the volume of the HCl gas is measured at standard conditions and that the solution is ideal.