The Following Compounds Are Available as 0 Pick Two Solutions That Could Be Used to Prepare a \begin{array}

Short Answer

The following compounds are available as 0.10 M aqueous solutions. $$\begin{array} { | l | l | l | } \hline \text { A) } \mathrm { HCl } & \text { B) aniline } & \text { C) } \mathrm { HCN } \\\hline \text { D) } \mathrm { KOH } & \text { E) methylamine } & \text { F) } \mathrm { HClO } \\\hline \text { G) } \mathrm { HClO } _ { 2 } & \text { H) } \mathrm { NaClO } _ { 2 } & \text { I) triethylamine } \\\hline\end{array}$$
Pick two solutions that could be used to prepare a buffer with a pH of ~ 4.