M mj m New member Jun 18, 2009 #1 in the determination of an equilibrium constant for a weak acid, why is not necessary to know the exact concentration of a weak acid?
in the determination of an equilibrium constant for a weak acid, why is not necessary to know the exact concentration of a weak acid?
R rpm92 New member Jun 18, 2009 #2 You need the concentration of hydrogen ion at equilibrium. From this the equilibrium conc. of the weak acid is inferred. The equilibrium conc of the undisociated acid is the initial acid conc. less that which has dissociated i.e. [H+].
You need the concentration of hydrogen ion at equilibrium. From this the equilibrium conc. of the weak acid is inferred. The equilibrium conc of the undisociated acid is the initial acid conc. less that which has dissociated i.e. [H+].
