Henderson-Hasselbalch Equation

Practice Questions

College Chemistry › Henderson-Hasselbalch Equation

Questions
10
1

What is the of a solution that contains hydrofluoric acid and fluoride?

Note: for hydrofluoric acid.

2

Determine the pH of an aqueous solution of 10 mL of 0.03 M acetic acid, and 15 mL of 0.025 M acetate, . pKa of acetic acid is 4.75.

3

You are in chemistry lab performing a titration. You were given an aqueous solution with an unknown concentration of acetate, to solve through titration with concentrated hydrochloric acid. You know that the pKa of acetic acid is 4.75 and that your titrant is 0.1 M hydrochloric acid.

After you have added 1 mL of 0.1 M hydrochloric acid, what is the dominant species in the solution? Note: The predominant species is the pH-determining species.

4

Ibuprofen has a pKa of . What is the ratio of to in the blood ( )?

5

Suppose that a solution containing equal amounts of acetic acid and acetate is combined with a solution containing hydrochloric acid. What is the pH of the resulting solution? The pKa of acetic acid is .

6

Determine the pH after combining these two solutions:

10 mL of 0.5 M NaOH

25 mL of 0.5 M acetic acid

pKa of acetic acid = 4.75

7

Determine the pH of the following combination of solutions:

6 mL of 0.25 M ammonium

5 mL of 0.34 M ammonia

pKa of ammonium = 9.26

8

A buffer contains ammonia and ammonium chloride. What is its pH?

9

Determine the pH of the following combination of solutions:

8 mL of 0.04 M HCl

5 mL of 0.8 M ammonia

pKa of ammonium = 9.26

10

Determine what volume of 0.1 M ammonia, in mL, should be added to 45 mL of 0.025 M ammonium to create a buffer solution with a pH of 7.34.

pKa ammonia = 9.26

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