A solution contains 19 conjugate acid base pairs. One of these is piperazine and its conjugate...
A solution contains 19 conjugate acid base pairs. One of these is piperazine and its conjugate acid with a [A-]/[HA] ration of 0.64. What is the pH of the solution? What can you say about the other 18 conjugate pairs?
Homework Answers
Mixture of piperazine and its conjugate acid produces a basic buffer.
pOH of the buffer is:
pOH = pKb + log [ conjugate acid]/ [base]
pOH = 4.19 + log (1/0.64) = 4.38
pH = 14 - 4.38 = 9.62
Other 18 conjugate pairs do not form buffers.
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