Explore the solubility of common ionic compounds in water with POLYATOMIC IONS. Find STAAR CHEMISTRY REFERENCE MATERIALS for the State of Texas Assessments of Academic Readiness. Discover which compounds are soluble, including CHO23 2, CHCOO3, NH4, NO3, CN, ClO, and ClO2, among others. Identify insoluble compounds like CO32, PO43, and CrO42. Learn about exceptions for specific ions and metals like Ag, Pb2, and Hg22. Enhance your knowledge of chemistry with detailed information on atomic …