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calculating the Ka value for lactic acid.?
Lactic acid, HC3H5O3, builds up in human muscles during anaerobic exercise. If the initial concentration of lactic acid is 0.12 M and the pH is 2.39, calculate the Ka value for lactic acid.
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- hcbiochemLv 71 day ago
HLa <--> H+ + La-
Ka = [H+][La-]/[HLa]
From the pH, [H+] = 10^-2.39 = 4.07X10^-3
[H+] = [La-]
Ka = (4.07X10^-3)^2 / 0.12 = 1.4X10^-4
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