Question

At equilibrium, what is the hydrogen-ion concentration if the acid dissociation constant is 0.000 001 and the acid concentration is 0.01M?

Answer 1

K\(_a\) = 1.0 \(\times\)10\(\sf ^{-6}\) and [H\(^+\)]=0.01 M
start by writing your equilibrium expression for the given dossociation reaction of the acid, [HA]

\(\sf \color{blue}{HA \rightleftharpoons H^+ + A^- }\)
Remember: K\(_a\)=\(\sf \frac{[products]}{[reactants]}\), and the concentration of the products are equal. So assume single variables for them, so you have [x][x] = [x\(^2\)]. And solve for it.
Can you take it from here?

Answer 2

yes thank you..that is what I was kindof thinking it was but I was not sure.