In the following relationships, Q stands for quinine and QH + for its protonated form?

Question

a) [ Q ] > [ QH + ]
b) [ QH + ] > [ Q ]
c) [ Q ] = [ QH + ]

Using the letters for the above relationships identify the dominant quinine species for each of the following steps of the above titration.

I. At the start of the titration
II. At the halfway-point
III. At the equivalence point

Answer 1

I. b II. a III. c