Calculate the masses of solid and water required to prepare 100 g of a solution with a mass fraction of a solute of 8.5%.

The mass of the solution is 100 grams;

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

m salt = 100 x 0.085 = 8.5 grams;

To find the mass of water, subtract the mass of salt from the mass of the solution:

m of water = 100 – 8.5 = 91.5 grams;

Check: 91.5 + 8.5 = 100;