Jalayirid2go Jalayirid2go Chemistry Answered A buffer is made with 0.493 M of the weak base methylamine ([tex]CH3NH2[/tex]) with 0.493 M [tex]CH3NH3Cl[/tex] (KA = 5.6 x 10^-4) What is the pH of this buffer system? If 0.100 M HBr is added to the buffer, what is the pH?