Calculate the mass of salt that you need to take to prepare 100 ml of N2CO3 solution with a concentration of 4 mol / liter.

Determine the required amount of a substance for preparing a solution.

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

In order to prepare such a solution, it is required to hang and dissolve 0.1 x 4 = 0.4 mol of salt in water.

Let’s calculate the required weight of salt.

To do this, we find the product of the molar weight of the salt and the amount of substance.

M Na2CO3 = 23 x 2+ 12 + 16 x 3 = 106 grams / mol;

m Na2CO3 = 0.4 x 106 = 42.4 grams;