Determine the mass of NaCl and H2O required for cooking 10 kg. solution with a mass fraction of NaCl 0.02.

Let’s find the masses of the components of the solution.

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

Determine the weight of the dissolved salt.

M salt = 10,000 x 0.02 = 200 grams;

Similarly, we find the weight of the solvent (water).

(In the calculations, we will make the assumption that the density of water is 1 gram / ml).

M water = 10,000 x 0.98 = 9,800 grams;

Let’s check. To do this, we sum up the masses of the components of the solution and obtain the weight of the solution in question.

9,800 + 200 = 10,000;