Column A

1.
The pH of a solution with a [H3O+] = 4.5 x 10-10 M.

2.
The pH of a solution with a [H3O+] = 4.9 x 10-8 M.

3.
The pH of a solution with a [H3O+] = 4.3 x 10-12 M.

4.
The pH of a solution with a [H3O+] = 8.4 x 10-9 M.

Column B
a.pH = 11.3
b.pH = 6.9
c.pH =12.0
d.pH= 8.1
e.pH = 8.6
f.pH = 7.3
g.pH = 2.1
h.pH = 3.4
i.pH= 9.3

Column A:

1. 9.35 (approximate)
2. 7.31 (approximate)
3. 11.37 (approximate)
4. 8.08 (approximate)

Column B:

a. pH = 11.3
b. pH = 6.9
c. pH =12.0
d. pH= 8.1
e. pH = 8.6
f. pH = 7.3
g. pH = 2.1
h. pH = 3.4
i. pH= 9.3