Iodous acid

Iodine tris(trifluoroacetate) Acetic acid, trifluoro-, trianhydride with iodous acid (H3IO3) (8, 9) (14353-86-7)... 

Iodine forme, with oxygen, compounds of various degrees of oxidation, the lowest being iodic oxide—10, and iodous acid—IOs the highest iodic acid—TOe,- and periodic acid—IOT. The latter three constitute salts with the metallic bases, which ore called iodites, iodates, and byperiodates respectively. To enter into a description of the processes by which they are prepared, would not be warranted by the uses whioh they serve —namely, of forming the links of analogy between iodine and chlorine, bromine, et cetera. 

What is the difference between iodous acid and hy-poiodous acid ... 

The fact that Figure 16.9 refers only to specific conditions is weU illustrated by considering the stability of 1(1). Hypo-iodous acid is unstable with respect to disproportionation into [103] and I2, and is therefore not formed when [103] acts as an oxidant in aqueous solution. However, in hydrochloric acid, HOI undergoes reaction 16.83. 

Solution a contained iodine and silver nitrate together with perchloric acid and sodium perchlorate. Solution contained sodium iodide, iodine, perchloric acid, and sodium perchlorate. Both solutions had a total ionic concentration equal to 1.0 mole 1 and contained the same concentration of perchloric acid. The object of the acid was to suppress the formation of h3qx)iodous acid according to the equilibrium... 

The observation of toxicity of iodine mainly focused on the iodide or iodate, which is normally present in iodized salt, milk, water and leachate of foodstuffs. However, the toxicity of some other species of iodine may be much higher than that of iodide and iodate. For the prevention of iodine deficiency disorders, iodized oil was used as an injection or administered orally in many countries iodized oil is normally produced by binding iodine atoms to the polyunsaturated fatty acid in the oil (Zimmermann et al, 2000). After administration, it was supposed that iodine is released gradually as iodide to maintain a constant supply of iodine to the body. Experience in the past decades shows that the utilization of iodized oil is safe. However, acute poisoning of iodized oil to children who are orally administered was reported in China in 1998 this may be related to the species of iodine, which may be more toxic than iodide or iodate. Iodine has been used as an effective, simple, and cost-efficient means of water disinfection (Backer and Hollowell, 2000), in which the active disinfectant species are elemental iodine and hypo-iodous acid. Doses of iodine below 1 mg/1 kill bacteria within minutes. Elemental iodine and hypoiodous acid remain in the disinfected water, which may be toxic to humans. 

Hint Hypochlorous acid, HOCl, is a weak acid with an ionization constant of 3.4 X 10" M, so that OCl" will hydrolyze slightly the ionization constant for hypo-iodous acid is about 10 M at 25°C. 

Write the chemical formula for each of the following, and indicate the oxidation state of the halogen or noble-gas atom in each (a) calcium hypobromite, (b) bromic acid, (c) xenon trioxide, (d) perchlorate ion, (e) iodous acid, (f) iodine pentafluoride. 

HCIO2 exists only in aqueous solution. It decomposes rapidly in base to give chlorite and chlorate ions and in acid to give chlorine dioxide and chlorate and chloride ions. There is some indirect evidence for the existence of bromous and iodous acids, but they are even less stable than HSIO2. 

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