consider the titration of a weak monoprotic acid (HA) with a strong base. If the titration...
consider the titration of a weak monoprotic acid (HA) with a strong base. If the titration has begun, but the equivalence point has not yet been reached, which of the following is true:
A) The solution is a bugger and the HH equation can be used to compute the solution pH
B) The excess titrant will dominate and control the pH at this point
C) The dissociation of the weak acid to donate protons will determine pH - make a RICE table and use the Ka to solve
D) The hydrolysis reaction of the deprotonated A- form controls the pH
Homework Answers
Correct option: A
Before reaching equivalence point, the solution will act as a buffer solution as it will contain both the acid (HA) and its conjugate base (A-). The pH of the buffer solution is calculated using the HH equation (Henderson-Hasselbalch equation : pH = pKa + log[A-]/[HA]).
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