Answer
The most appropriate representation is in the drawing number $(i)$.
Work Step by Step
- The original solution has a strong monoprotic acid:
So, it can't be neither $(ii)*$ nor $(iv)**$
* The initial pH is too high for a strong acid.
** Monoprotic acids have only one equivalence point.
Considering pure solutions with the same concentration, strong acids have lower pH than weak ones, therefore, the best representation is in the drawing number $(i)$
