Ejercicios analitica SlideShareJun 28, 2017· Calcular el pH de la solución que resulta cuando 40.0 mL de NH3 0.100 M (Kb = 1.75 x 10−5 ), a) se diluyen hasta 200.0 mL con agua destilada. R = 10.77 b) se mezclan con 20.0 mL de solución de HCl 0.200M.Buffer solution WikipediaA buffer solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa.Its pH changes very little when a small amount of strong acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications.DOF Diario Oficial de la FederaciónAjustar el pH a 6.8 ± 0.2 y agregar 2.25mL de solución