solve Ka for HX => H^+ + X^- given 0.1M LiX at pH=8.9
Chemistry - DrBob222, Tuesday, March 30, 2010 at 6:32pm
LiX(aq) ==> Li^+(aq) + X^-(aq)
Question for DrBob222 - is the X^- value in the ICE calculations 0.1 from the initial LiX 0.1M?
X^- is a base and hydrolyzes in water to
X^- + HOH ==> HX + OH^-
Make an ICE chart and substitute into the following:
Kb = (Kw/Ka) = (HX)(OH^-)/(X^-)
You know pH, convert to pOH, then to OH^-. HX = OH^-. You know Kw. The only unknown is Ka. Solve for that. Post your work if you get stuck.