Question

What is the pH of a solution of 0.36 M
H
C
l
, 0.62 M
N
a
O
H
, and 0.15 M
H
N
O
3
?

Answer 1

Answer:

Hydrochloric acid and nitric acid are strong acids, and sodium hydroxide is a strong base; these all dissociate completely.

Explanation:

Hydrochloric acid and nitric acid are strong acids, and sodium hydroxide is a strong base; these all dissociate completely. The total [H+] from the two acids is 0.51 M and [OH-] from NaOH is 0.62 M. Therefore, 0.51 moles per liter of H+ will react with 0.51 moles per liter of OH- to form water. That leaves a 0.11 M NaOH solution. The pOH of a 0.11 M NaOH solution is 0.96 pOH units, and the pH is 13.04 pH units.