Which of the following statements regarding the Henderson-Hasselbalch (HH) equation are correct?
I The HH equation is pH = pKa + log
II The HH equation can be used whenever the concentrations of [HA] and [A-] are nonzero.
III If [HA] equals 50-times [A-], the HH equation states that the pH will be 1.7 units higher than the pKa of HA.
A. All statements are correct
B. Only statements I and II are correct
C. Only statements II and III are correct
D. Only statement I is correct
E. None of the statements is correct
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