Quiz 10

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Quiz
1. What is the pH of solution with that has a formal HA (acid)
concentration of 0.150 M. HA has a pKa of 5.00. Show your work.
a. 11.3
b. 3.9
c. 2.24 x 10-3
d. 2.65 - I calculated the answer using a
concentration of 0.500 M – everyone receives credit for this problem.
2. If [OH-] in an aqueous solution is 4.56x10-5, what is the pH of the
solution?
a. 4.34
c. 9.66
b. 2.19 x 10-10
d. 1.00
Quiz
3. What is the pH of a 3.5 x 10-4 M solution of acetate ion?
a.
b.
c.
d.
3.5
10.5
2.9 x 10-11
Need additional information to solve the problem.
4. How much more OH- ion is in a solution with a pH of 4 versus a
solution with a pH of 2?
a.
b.
c.
d.
double the amount
10 times more
100 times more
1000 times more
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