What volume of sulfuric acid with a mass fraction of 92% and a density of 1.82 g / ml

What volume of sulfuric acid with a mass fraction of 92% and a density of 1.82 g / ml should be taken to prepare 250 ml of a 0.3 M solution.

Let’s find the required amount of the substance for the preparation of this solution.

To do this, multiply the volume of the solution and its molar concentration.

In order to prepare such a solution, it is necessary to weigh and dissolve 0.25 x 0.3 = 0.075 mol of acid in water.

Let’s find the required mass of acid.

To do this, we multiply the molar weight of the acid by the chemical amount of the substance.

M H2SO4 = 2 + 32 + 16 x 4 = 98 grams / mol;

m H2SO4 = 98 x 0.075 = 7.35 grams;

Find the required volume of acid.

V H2SO4 = 7.35 / 1.82 / 0.92 = 4.39 ml.