Consider a solution prepared by dissolving 0.35 mol of CH3NH3 Cl- (methylamine hydrochloride) in 1.00 L of 1.1 M CH3NH2 (methylamine). If 10 mL of 0.10 M HCl is added to this buffer solution, the pH of the solution will slightly because the HCl reacts with the present in the solution to produce a .