Calculate the masses of copper (II) sulfate and water that must be taken to prepare a solution

Calculate the masses of copper (II) sulfate and water that must be taken to prepare a solution weighing 100 g with a mass fraction of a solute of 0.04.

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 0.04 = 4 grams;

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

m of water = 100 – 4 = 96 grams;

The density of water is 1 gram / cm3. To prepare this solution, it is necessary to measure out 96 milliliters of water.

Check: 96 + 4 = 100;