Question 6 / 58:  What is the Henderson and Hasselbach equation?
pH= pka + log (A^-) / (HA)

e.g. pH in stomach = ~2 and pKa asprin= ~3.5

2=3.5 + log (A-)/(HA)

log (A-)/(HA) = -1.5

10^-1.5 = 0.03 [Proportion of unionised molecules for every 1 ionised]

1/0.03 = 33 %

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Pharmacology (Test) [Excluding Nervous System]

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