# What is the pH of a 6.85 × 10−3 M weak acid solution, HA, if Ka...

###### Question:

What is the pH of a 6.85 × 10−3 M weak acid solution, HA, if Ka = 4.5 × 10−6?

1.2

4.8

9.1

3.8

6.5

What is the pOH of 4.50 × 10−4M HBr?

10.7

6.7

1.7

12.3

3.3

What is the pH of a 9.67 × 10−3M solution of NaOH?

13.0

4.6

12.0

9.4

2.0

A 6.5 × 10-2 M solution of a weak acid, HA, has a pH of 3.25. What is the Kb for the conjugate of this weak acid?

3.7 × 10-5

2.1 × 10-9

2.7 × 10-10

4.9 × 10-6

1.2 × 10-12

Calculate the equilibrium concentration of the [H+] in a 7.2 × 10-3 M solution of HA that has a Ka of 5.45 × 10-8.

3.92 × 10-7

7.35 × 10-3

8.49 × 10-2

2.0 × 10-5

6.30 × 10-8

What is the pH of a 9.25 × 10-2 M solution of NaF, a weakly basic salt?

11.89

5.93

8.07

9.82

4.18

Calculate the pH of 5.34 × 10-8 M citric acid, H3C6H5O7.

4.27

5.20

3.01

6.84

9.73

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