How many liters of hydrochloric acid with a molar concentration of 6.4 mol / L and water

How many liters of hydrochloric acid with a molar concentration of 6.4 mol / L and water do you need to take to get 10 liters of a solution of hydrochloric acid with a concentration of 1.5 mol / L

1. find the amount of dissolved hydrogen chloride:

n (HCl) = C2 (HCl) * V2 (solution HCl);

n (HCl) = 1.5 * 10 = 15 mol;

2.Calculate the volume of the initial solution:

V1 (solution HCl) = n (HCl): C1 (HCl);

V1 (solution HCl) = 15: 6.4 = 2.34 l;

3. find the volume of added water:

V (water) = V2 (solution HCl) – V1 (solution HCl);

V (water) = 10 – 2.34 = 7.66 liters.

Answer: you need to take 2.34 liters of hydrochloric acid and 7.66 liters of water.