1 answer

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?

Group of answer choices

1.2

4.8

9.1

3.8

6.5

What is the pOH of 4.50 × 10−4M HBr?

Group of answer choices

10.7

6.7

1.7

12.3

3.3

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

Group of answer choices

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?

Group of answer choices

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.

Group of answer choices

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?

Group of answer choices

11.89

5.93

8.07

9.82

4.18

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

Group of answer choices

4.27

5.20

3.01

6.84

9.73


Answers

I'm very sorry to say that according to the HOMEWORKLIB RULES we are allowed to solve only first question. Please co-operate. Thankyou.

1.

Option 4 (3.8) is the correct answer.

.

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