Determine the mass of salt and water that must be taken to prepare 60 g of a solution

Determine the mass of salt and water that must be taken to prepare 60 g of a solution with a mass fraction of a solute of 25%.

The mass of the solution is 60 grams;

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

m salt = 60 x 0.25 = 15 grams;

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

m of water = 60 – 15 = 45 grams;

The density of water is 1 gram / cm3. To prepare this solution, you need to measure out 45 milliliters of water.

Check: 45 + 15 = 60;