chemistry

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?
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.

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

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    posted by Alyssa
  2. I dont understand

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    posted by Help me

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