Biochemistry at The Biology Project

Acids & Bases Problem Set

Question 7: Neutralizing a basic solution


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 pKa calculation is necessary).

A. 4
B. 40


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

[Problem 7] [Tutorial] [Problem 8]

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January 6, 1999
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