Calculate the masses of water and salt required to prepare 100 g of a solution with a mass fraction

Calculate the masses of water and salt required to prepare 100 g of a solution with a mass fraction of sodium carbonate (soda) of 0.13.

Find the weight of the dissolved salt.

M salt = 100 x 0.13 = 13 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 (solvent) = 100 x 0.87 = 87 grams = 87 ml;

Let’s check. To do this, add the masses of the components of the solution and obtain the mass of the required solution.

13 + 87 = 100;