Posted by racha on Wednesday, April 4, 2012 at 11:23am.
0.25 x 0.003 = 7.5E-4
..............HA ==> H^+ + A^-
initial.......0.25.....0.....
change.....-7.5E-4...7.4E-4..7.5E-4
equl..........?........?......?
Ka = (H^+)A^-)/(HA)
Substitute and solve for Ka.
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