When heating 100 g of ammonia solution with a mass fraction of 1.2%, a solution of 90 g mass

When heating 100 g of ammonia solution with a mass fraction of 1.2%, a solution of 90 g mass with a mass fraction of 1% was formed. Calculate the volume of released ammonia.

1) Find the mass of ammonia in the solution before heating:

1.2% = x: 100 (g) * 100%;

x = 1.2%: 100 (g) * 100% = 1.2 (g).

2) Calculate the mass of ammonia in the solution remaining after evaporation:

1% = x: 90 (g) * 100%;

x = 1% * 90 (g): 100% = 0.9 (g).

3) Let’s find the difference between the masses of ammonia, in solutions before and after evaporation:

1.2 – 0.9 = 0.3 (d).

4) Knowing that the molecular weight of ammonia is 17, and the molar volume of any gas is 22.4 liters, we will make the proportion:

17 g – 22.4 L;

0.3 g – xl.

x = 22.4 L * 0.3 g: 17 g = 0.39 (L) ammonia gas evaporated.