Calculate the amount of sodium hydroxide substance that will be required to prepare a 60 g

Calculate the amount of sodium hydroxide substance that will be required to prepare a 60 g solution with a 15% alkali mass fraction.

Find the weight of the alkali.

M alkali = 60 x 0.15 = 9 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 = 60 x 0.85 = 51 grams = 51 ml;

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

9 + 51 = 60;