the Ka for acetic acid, HC2H3O2, is 1.8x10-5 at 25 deg. Celsius. In a .10 M solution of potassium acetate, which of the following are true?

Question

I. [HC2H3O2] = [OH-]
II. [H+] = [OH-]
III. [C2H3O2-] < .10 M

a. I only
b. II only
c. III only
d. I and II
e. I, II and III

What is your thinking on this? Ask yourself why would I be true, or II, or III?

We will be happy to critique your thinking.

Answer 1

Ka = [H+]
pH= -log[1.8x10^-5]
pH = 5

Answer 2

I dont understand