To make 500 mL of 3.0 M #HCl#, how many liters of concentrated 18.0 M #HCl# does one need?
To begin, I don't think you can buy
This question is a real dog's breakfast, in that the examiner was clearly not a chemist. I have written before here (on and on and on), that when you work with concentrated acids, the order of addition is important. Acid is always added to water, not water to acid, Why not? Because water to acid WILL spit at you. The question was not sound from this practical viewpoint either.
When we work with acids (with real concentrations), we use the relationship: