Acids & Bases Problem Set

Question 7: Neutralizing a basic solution

Correct!

How many ml of a 0.4 M HCl solution are required to bring the pH of 10 ml of a 0.4 M NaOH solution to 7.0 (neutral pH)?

Note: HCl and NaOH both completely dissociate in water (i.e., no pK_a calculation is necessary).

A.	4
B.	40
C.	10 Because both the acid and the base are at the same concentration and both completely dissociate in water, a neutral pH can be achieved by adding an equal amount of the acid solution to the base solution.
D.	20
E.	2