# Calculate the mass of table salt required to prepare 800 g of a 40% solution of this salt.

January 15, 2021 | education

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

This requires multiplying their mass fraction by the weight of the solution.

Find the weight of the dissolved salt.

M salt = 800 x 0.4 = 320 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 = 800 x 0.6 = 480 grams = 480 ml;

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

480 + 320 = 800;

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