Solutions of Each of the Hypothetical Acids in the Following

Multiple Choice

Solutions of each of the hypothetical acids in the following table are prepared with an initial concentration of 0.100 M. Which of the four solutions will have the lowest pH and be most acidic? $$\begin{array} { c c } \text { Acid } & \mathbf { p } \boldsymbol { K } _ { \mathbf { a } } \\\mathrm { HA } & 4.00 \\\mathrm { HB } & 7.00 \\\mathrm { HC } & 10.00 \\\mathrm { HD } & 11.00\end{array}$$

A) HA
B) HB
C) HC
D) HD
E) All will have the same pH because the concentrations are the same.