Calculate the mass of a simple substance fluorine, which can be obtained from the mineral fluorite weighing 160 g.

To solve the problem, let’s compose the equations:
1. CaF2 + H2SO4 (conc.) = CaSO4 + 2HF – ion exchange, hydrofluoric acid was obtained;
2. 2HF = H2 + F2 – fluorine was obtained during electrolysis;
3. Calculations:
M (CaF2) = 77.8 g / mol.
M (HF) = 37.8 g / mol.
Y (CaF2) = m / M = 160 / 77.8 = 2 mol.
4. Proportion:
2 mol (HF) – X mol (F2);
-2 mol – 1 mol from here, X mol (F2) = 2 * 1/2 = 1 mol.
5. Find the mass of the product:
m (F2) = Y * M = 1 * 37.8 = 37.8 g.
Answer: fluorine was obtained with a mass of 37.8 g.