How many grams of K2CO3 should be taken to prepare 0.5 l of 02M 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 0.5 x 0.2 = 0.1 mol of salt in water.

Let’s find the required mass of salt.

To do this, we multiply the molar mass of the salt by the chemical amount of the substance.

M K2CO3 = 39 x 2+ 12 + 16 x 3 = 138 grams / mol;

m K2CO3 = 0.1 x 138 = 13.8 grams;