Identify the predominant species in each region of this titration curve. Explain how to calculate the pH in each region.
\[
\begin{aligned}
{\left[\mathrm{H}^{+}\right] } & =\frac{\text { moles } \mathrm{H}^{+} \text {left }}{\text { total volume }} \\
\mathrm{pH} & =-\log \left[\mathrm{H}^{+}\right]
\end{aligned}
\]
Volume of titrant added
6:43