J.R. S. answered 04/27/21
Ph.D. University Professor with 10+ years Tutoring Experience
An acid with a "small" Ka will not dissociate appreciably, and so at any given concentration of acid, the pH will not be as low as other acids with greater Ka values. From the table, it looks like Acid 4 would satisfy this prediction.

J.R. S.
04/27/21
Sdasd D.
I though it was pH of Acid 2 since the values are small and they are decreasing04/27/21