Posted by jaji on Monday, June 20, 2011 at 10:30am.
using the hasselbachHanderson equation calculate the fraction of asprin Pka is 5.6 and PH is 8.6?

grenoble  SraJMcGin, Monday, June 20, 2011 at 10:45am
If you need more information on the equation, try some of the following links:
http://search.yahoo.com/search?fr=mcafee&p=hasselbachHanderson+equation
For the calculation itself, you might find something useful in some of the following:
http://search.yahoo.com/search?fr=mcafee&p=calculate+the+fraction+of+asprin+Pka+is+5.6+and+PH+is+8.6%3F
Sra 
grenoble  Dr Russ, Monday, June 20, 2011 at 10:50am
Do you want the fraction [A]/[HA] dissociated?
[Your value for the pKa for aspirin is low from memory =about 3.5??]
From the HH equation
pH=pKa+log([A]/[HA])
8.6=5.6 + log([A]/[HA])
3.0=log([A]/[HA])
so
10^+3 = [A]/[HA]