What is the mass of potassium nitrate required to prepare 60 g of a solution with a mass fraction of 10%?

Determine the weight of the components of the solution

To do this, it is necessary to multiply their mass fraction by the weight of the solution.

Let’s calculate the weight of the dissolved salt.

M salt = 60 x 0.1 = 6 grams;

In the same way, we find the weight of the solvent (water).

(In the calculations, we take the density of water equal to 1 gram / cm3).

M water = 60 x 0.9 = 54 grams = 54 ml;

Let’s check. To do this, add the masses of the components of the solution and get the weight of the solution in question.

54 + 6 = 60;