Your choice (p-chloroaniline) is

Let's separate the p-chloroaniline.

You want to extract p-chloroaniline into the aqueous solution by changing it to a water soluble salt. Which aqueous solution will you add?

dilute aqueous HCl
dilute aqueous NaOH
saturated aqueous NaHCO3

Click ADD to add the selected solution to the separatory funnel