17) What is the relationship between Ka and Kb at 25C for a conjugate acid base pair?17) A) Ka-Kb = 1 x 10-14B) Kb/Ka = 1 10-14 C) Ka/Kb = 1 x 10-14D) Kax Kb=1 x 10-14 18) What is the conjugate base of the Bronsted-Lowry add HPO42-718). A) HPO42-B) H2PO4-C) PO43-D) H3PO4 The following pictures represent equal volumes of aqueous solutions of three acids HA (A=X, Y, or Z); water molecules have been omitted for clarity. - HA =HO* HX HY Section Break- =A" HZ