Question: are all ammonium salts soluble?
Answer: All sodium, potassium, and ammonium salts are soluble in water. ... The chlorides, bromides, and iodides of all metals except lead, silver, and mercury(I) are soluble in water. HgI2 is insoluble in water. PbCl2, PbBr2, and PbI2 are soluble in hot water.