If you need to prepare 1.5 L of a 1.5 M solution of nitric acid, how many milliliters of 9.0 M nitric acid will you have to dilute to 1.5 L?
Well, we must remember to add acid to water....we need
We want a solution whose volume is
And this represents a molar quantity of
And so you add
We remember that if you spit in acid, it spits back.