Calculate the acid dissociation constant of a weak monoprotic acid if a 0.5m solution of this acid gives a hydrogen-ion concentration of 0.000 1m? show your work. hint: monoprotic means containing one proton. a lot!

Let the acid be HA.
The chemical formula for this acid will be the following:



The formula for the acid dissociation constant will be the following:



We know [H+]=0.0001 (it's given).
However, we must find [A-] and [HA] in order to solve for the constant.

We find that [A-]=[H+] by using a electroneutrality equation.
Also, we can create a concentration equation to find [HA].




Now, we can find the acid dissociation constant.