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Iodate
An iodate is the polyatomic anion with the formula IO−3. It is the most common form of iodine in nature, as it comprises the major iodine-containing ores. Iodate salts are often colorless. They are the salts of iodic acid.
Iodate is pyramidal in structure. The O–I–O angles range from 97° to 105°, somewhat smaller than the O–Cl–O angles in chlorate.
Iodate is one of several oxyanions of iodine, and has an oxidation number of +5. It participates in several redox reactions, such as the iodine clock reaction. Iodate shows no tendency to disproportionate to periodate and iodide, in contrast to the situation for chlorate.
Iodate oxidizes iodide in acidic conditions:
Similarly, chlorate oxidizes iodide to iodate:
Iodate is also obtained by reducing a periodate with a sulfide. The byproduct of the reaction is a sulfoxide.
Iodate is unusual in that it forms a strong hydrogen bond with its parent acid:
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Iodate
An iodate is the polyatomic anion with the formula IO−3. It is the most common form of iodine in nature, as it comprises the major iodine-containing ores. Iodate salts are often colorless. They are the salts of iodic acid.
Iodate is pyramidal in structure. The O–I–O angles range from 97° to 105°, somewhat smaller than the O–Cl–O angles in chlorate.
Iodate is one of several oxyanions of iodine, and has an oxidation number of +5. It participates in several redox reactions, such as the iodine clock reaction. Iodate shows no tendency to disproportionate to periodate and iodide, in contrast to the situation for chlorate.
Iodate oxidizes iodide in acidic conditions:
Similarly, chlorate oxidizes iodide to iodate:
Iodate is also obtained by reducing a periodate with a sulfide. The byproduct of the reaction is a sulfoxide.
Iodate is unusual in that it forms a strong hydrogen bond with its parent acid: