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

\[K _{a}=\frac{ \left[ products \right] }{ \left[ reactants \right] }\]

Answer 2

So, to know what the products and reactants are, we will need to write the equilibrium reaction.

Answer 3

Making sense so far, @fashionlove?

Answer 4

yes, what is the nest step?

Answer 5

Write a general acid dissociation reaction:
HA <-> H+ + A-

Answer 6

Can you write the Ka equation?

Answer 7

Sweet! :)

Answer 8

Plug in your numbers and solve for x.

Answer 9

Over 0.01, but I think that is what you meant

Answer 10

0.000001*0.01=x^2

Answer 11

That means 1x10^-8

Answer 12

Right!

Answer 13

Which simplifies to..?

Answer 14

Yup! Good job!

Answer 15

thanks:)

Answer 16

No worries :)