Calculate the equilibrium concentration of hydrogen ions

[fender1984]

Homework Statement

 

[Borek]

http://en.wikipedia.org/wiki/ICE_table

 

[fender1984]

Thank you for the link Borek but I'm still lost

 

[Borek]

You have to directly apply the ICE table method to your case.

What is your HA? A^-?

Basically it is about stoichiometry - from the dissociation reaction you can easily see that for each mole/molecule of A^- (H⁺) produced, one mole/molecule of HA is consumed. You just have to express concentrations of all three substances involved (HA, H⁺, A^-) in terms of one unknown - best approach is to use H⁺ as the unknown, as you are asked about pH.