Question

Acetic acid has a pKa of 4.8. Which of the following statement/s are correct? (Select ALL that apply.)

Answer
A.The pKa is the pH at which half the compound is protonated (H+) and half is unprotonated.
B.When the pH equals the pKa there is 50% ionization.
C.When the pH and pKa are the same it is called the neutralization point.
D.Acetic acid acts as a weak base at physiologic pH.
E.An acid picks up protons released by bases in solution

Answer 1

The correct statements are A, B, and E. Statement C is incorrect because the neutralization point refers to the point of complete reaction between an acid and a base, not when the pH and pKa are the same. Statement D is incorrect because acetic acid acts as a weak acid, not a weak base, at physiologic pH.

Step-by-step explanation:

The correct statements are:

1. A. The pKa is the pH at which half the compound is protonated (H+) and half is unprotonated.
2. B. When the pH equals the pKa there is 50% ionization.
3. E. An acid picks up protons released by bases in solution.

Statement C is incorrect because the neutralization point refers to the point of complete reaction between an acid and a base, not when the pH and pKa are the same. Statement D is incorrect because acetic acid acts as a weak acid, not a weak base, at physiologic pH.