Identify which of the following statements that are true of buffer solutions: 1) A buffer solution could consist of equal concentrations of ammonia and ammonium bromide. 2) A buffer solution could consist of equal concentrations of perchloric acid (HClO4) and sodium perchlorate. 3) A buffer solution will change only slightly in pH upon addition of small amounts of acid or base. 4) If you add NaOH to a buffer solution containing benzoic acid (C6H5COOH) and sodium benzoate (NaC6H5COO), the species that reacts with added hydroxide ion is the benzoate ion. Group of answer choices