Question

Describe, in detail, how to make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution.

Answer 1

( 5.5 L) x (2.5 M HCl) / (10.5 M HCl) = 1.3 L

So take 1.3 liters of the stock solution and dilute it with water to exactly 5.5 liters.