Define buffer capacity. A) Buffer capacity is B) Buffer capacity is C) Buffer capacity is D) Buffer capacity is its effectiveness. E) Buffer capacity is the amount of acid that can be added until all of the acid is used up. the amount of acid that can be added until all of the base is used up. the amount of base that can be added until all of the base is used up. the amount of acid or base that can be added to a buffer without destroying 19) 20) the amount of base that can be added until all of the acid is used up.