Question

The ph of a solution made of 0.1 m acetic acid and 0.1 m potassium acetate is (ka = 1.8 x 10-5)

Answer 1

It is a buffer solution

pH = pKa + log([ Salt ]/[ Acid])

Now the

Salt to Acid conc. Ratio is 1

So pH is pKa

pKa= -logKa = 4.74