What volume of a solution of 5m con is required to prepare a solution of 0.6m con with a volume of 250 ml?

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 necessary to weigh and dissolve 0.25 x 0.6 = 0.15 mol of alkali in water.

This amount of alkali is contained in 0.15 / 5 = 0.03 liters of a 5M solution of this alkali.

Thus, to prepare this solution, it is necessary to measure out 30 ml of 5M alkali solution.