How much ammonia is required to prepare 50 g of a 25% solution?

The mass of the ammonia solution is 50 grams;

To find the mass of ammonia, it is necessary to multiply its mass fraction by the mass of the solution.

m ammonia = 50 x 0.25 = 12.5 grams;

Let’s find the amount of ammonia substance.

M NH3 = 14 + 3 = 17 grams / mol;

N NH3 = 12.5 / 17 = 0.735 mol;

Let’s find the volume of ammonia.

Under normal conditions, one mole of ideal gas takes up a volume of 22.4 liters.

V NH3 = 0.735 x 22.4 = 16.464 liters;