A few common weak acids with their acid dissociation constants,Ka, are listed in the table:

Acid	Ka
HOAc	1.8 × 10-5
HCHO2	1.8 × 10-4
HClO	3.0 × 10-8
HF	6.8 × 10-4

Rank the acids above from weakest to strongest.

Which acid above has the weakest conjugate base?

question 2

What is the pH of a 0.0015 M HClO₃ solutionat 25.0 °C?

Group of answer choices

3.82

2.82

6.50

-6.50

11.18

Flag question: Question 19

The pH of an aqueous solution at 25.0 °C is 10.30. What is themolarity of OH^- in this solution?

Group of answer choices

5.0 x 10^-11

2.0 x 10^-4

3.70

1.0 x 10^-13

2.0 x 10¹⁰

Flag question: Question 20

Which of the following aqueous solutions has the lowest[OH^-]?

Group of answer choices

a solution with a pH of 3.0

a 1 x 10^-4 M solution of HNO₃

a solution with a pOH of 12.0

pure water

a 1 x 10^-3 M solution of HF

Flag question: Question 21

Calculate the concentration (in M) of hydronium ions in asolution at 25.0 °C with a pOH of 4.223.

Group of answer choices

5.98 x 10^-5

1.67 x 10^-10

1.67 x 10⁴

5.99 x 10^-19

1.00 x 10^-7

Question

The acid-dissociation constant, Ka, for an unknown acid HA is4.57 × 10-3. What is the base-dissociation constant, Kb, for theunknown anion A-?

Group of answer choices

2.19 × 10-12

7.81 × 10-6

2.19 × 102

5.43 × 10-5

4.57 × 10-3