Question

Calculate The Dissociation Constant Of A Weak Monoprotic Acid If A 0.08 M Solution Of This Acid Gives A Hydrogen-ion Concentration Of 0.0001 M?

Answer 1

Reaction
AcH -> Ac- + H+

\[Ka= \frac{ [Ac ^{-}]\times[H ^{+}] }{[AcH] }\]

the [Ac-] = [H+] = 0.0001 M
[AcH] = 0.08 M

Answer 2

https://en.wikipedia.org/wiki/Dissociation_constant