Question

1. What is the pH of a solution whose [H3O+] is 1 X 10^ -5 M?

2. What is the [H3O+] concentration of a solution with a pH of 9?

3. What is the pH of a solution whose [H3O+] concentration is 3 X 10^-3 M?

4. What is the pH of a solution with a [H3O+] concentration of 1 X 10^ -12 M?

5.What is the [H3O+] concentration of a solution whose pH is 8.9?

Answer 1

pH = -log(H3O^+) and
(H3O^+)(OH^-) = Kw = 1E-14
will work all of these.

Answer 2

1. 5
2. 1.0 x 10^-5
3. 2.5
4. 12
5. 1.26 x 10^-9

Answer 3

H3O+] = 4.2 x 10 -5 M. What is the ph?