Iodate

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Space-filling model of the iodate anion, IO3−
Space-filling model of the iodate anion, IO3−

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.

Iodates are a class of chemical compounds containing this group. Examples are sodium iodate or NaIO3 and calcium iodate or Ca(IO3)2. Iodates resemble chlorates with chlorine instead of iodine.

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.

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