What is the hydrogen-ion concentration if the acid dissociation constant is 0.000001 and the acid concentration is 0.01M?

I have no idea how to go about this. I know the formulas, but the numbers and letters confuse me.

Question

What is the hydrogen-ion concentration if the acid dissociation constant is 0.000001 and the acid concentration is 0.01M?

I have no idea how to go about this. I know the formulas, but the numbers and letters confuse me.

aaronq · Answer

set up an equilibrium expression, then solve for [H+]

abb0t · Answer

ICE table?

aaronq · Answer

you could do an ice table, but you can just set up

$$Ka=\frac{ [H ^{+}][A ^{-}] }{ [HA] }$$

[H+]=[A-] because they dissociate in a 1:1 ratio

so it's just $$Ka=\frac{ x^2 }{ [HA] }$$

[H+]=x

abb0t · Answer

I 4got all my pchem/ gchem. Lol

aaronq · Answer

i recently took analytical chem, so i'm fresh with all kinds stoichio and junk, otherwise i would be rusty too

anonymous · Answer

What do I put in the spot for [HA]?

aaronq · Answer

HA = acid 
[  ] = conc

abb0t · Answer

Why is this back up again Lol. after 3 months.