a scientist is investigating the solubility of two polyatomic ions, oxalate ( c2o2−4 ) and arsenate ( aso3−4 ), which are not listed in the table of solubility guidelines. the scientist starts with four solutions made of water-soluble salts. solution a contains sodium arsenate. solution b contains ammonium oxalate. soution c contains silver chlorate. solution d contains aluminum bromide.
