Conjugate base What remains of an acid

Conjugate acid-base pair two species related to each other by the donating and accepting of a single proton. (7.1) Conjugate base what remains of an acid molecule after a proton is lost. (7.1)... 

Conjugate base what remains of an acid moiecuie after a proton is iost. (14.1)... 

When the following equilibrium is established HC2H302(aq) <—> H1+(aq) + C2H3021 (aq) and a base is introduced, the H1+ is consumed but the acetic acid will form more H1+ ions as the equilibrium shifts to the left. If an acid were introduced, then the acetate ion is available to consume the added H1+ and shift the equilibrium to the left. These shifts in equilibrium are what cause the pH to remain stable. There is one catch, however. For the buffer to be effective, the concentrations of the acid and its conjugate base must have a concentration far greater than that of any added acid or base. 

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