The amino acid glycine is 99% dissociated at pH 11.6 (pKa = 9.6). This information about glycine is here as a hint for helping you solve (3a) and (3b). At what pH is serine (pKa = 9.15)... (a) 66% dissociated? (b) 5.0% dissociated?
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The equation is: pH = pKa + log([A-]/[HA]) where pKa is the dissociation constant of the acid (in this case, serine), [A-] is the concentration of the dissociated form (the conjugate base), and [HA] is the concentration of the undissociated form (the acid). (a) Show more…
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