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It can be prepared by reacting a potassium-containing base such as potassium hydroxide with iodic acid, for example: [1] HIO 3 + KOH → KIO 3 + H 2 O. It can also be prepared by adding iodine to a hot, concentrated solution of potassium hydroxide: [1] 3 I 2 + 6 KOH → KIO 3 + 5 KI + 3 H 2 O
Iodic acid is a white water-soluble solid with the chemical formula HIO 3. Its robustness contrasts with the instability of chloric acid and bromic acid. Iodic acid features iodine in the oxidation state +5 and is one of the most stable oxo-acids of the halogens. When heated, samples dehydrate to give iodine pentoxide. On further heating, the ...
Iodine monochloride is soluble in acids such as HF and HCl but reacts with pure water to form HCl, iodine, and iodic acid: ICl + H 2 O → HCl + HI + 1 ⁄ 2 O 2 2 ICl + H 2 O → 2 HCl + I 2 + 1 ⁄ 2 O 2 5 ICl + 3 H 2 O → 5 HCl + HIO 3 + 2 I 2. ICl is a useful reagent in organic synthesis. [2]
IF 5 reacts vigorously with water forming hydrofluoric acid and iodic acid: IF 5 + 3 H 2 O → HIO 3 + 5 HF. Upon treatment with fluorine, it converts to iodine heptafluoride: [6] IF 5 + F 2 → IF 7. It has been used as a solvent for handling metal fluorides.
Orthoperiodic acid, H 5 IO 6, is stable, and dehydrates at 100 °C in a vacuum to metaperiodic acid, HIO 4. Attempting to go further does not result in the nonexistent iodine heptoxide (I 2 O 7), but rather iodine pentoxide and oxygen. Periodic acid may be protonated by sulfuric acid to give the I(OH) + 6 cation, isoelectronic to Te(OH) 6 and ...
It can be obtained by the reaction of dysprosium nitrate or dysprosium chloride and iodic acid at 200 °C. It exists in two crystal forms: α-form and β-form. [1] Its solubility in water at 25 °C is 1.010±0.001 10 −3 mol·dm −3). Adding ethanol or methanol to water will reduce the solubility. [2]
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Ammonium iodate can be obtained by neutralising a solution of iodic acid with ammonia. [2] HIO 3 + NH 3 → NH 4 IO 3. Using its low solubility in water, it can also be precipitated from an iodate solution with an ammonium salt. 2 KIO 3 + (NH 4) 2 SO 4 → 2 NH 4 IO 3 + K 2 SO 4
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