c) None, all the anions form a precipitate with some of the cations in the table e.g. Pb2+ forms an insoluble salt with all the anions listed. d) None, all the anions form a soluble salt with K+, NH4+ for example. Solution c) None, all the anions form a precipitate with some of the cations in the table e.g. Pb2+ forms an insoluble salt with all the anions listed. d) None, all the anions form a soluble salt with K+, NH4+ for example..