An iodate is a salt of iodic acid. In the iodate anion, iodine is bonded to three oxygen atoms and the molecular formula is IO3-. The molecular geometry of iodate is trigonal pyramid.; In acid conditions, iodic acid is formed. Potassium hydrogen iodate (KH(IO3)2 is a double salt of potassium iodate and iodic acid and an acid as well. Iodates are used in the Iodine clock reaction.; Iodates are a class of chemical compounds containing this group. Examples are sodium iodate or NaIO3 and calcium iodate or Ca(my6)2. Iodates resemble chlorates with chlorine instead of iodine.