Oxoacids halogen

The preparative chemistry and technical applications of the halogen oxoacids and their salts have been actively pursued and developed for over two centuries (p. 790) and can now be very satisfactorily systematized in terms of general... 

More detailed consideration of these various equilibria and other redox reactions of the halogen oxoacids will be found under the separate headings below. As expected, the rates of redox reactions of the halogen oxyanions will depend, sometimes crucially, on the precise conditions used. However, as a very broad generalization, they tend to become progressively faster as the oxidation state of the halogen decreases, i.e. ... 

Hypofluorous acid is the most recent of the halogen oxoacids to be prepared. Traces were obtained in 1968 by photolysis of a mixture of F2 and H2O in a matrix of solid N2 at 14-20 K but weighable amounts of the compound were first obtained by M. H. Studier and E. H. Appelman in 1971 by the fluorination of ice ... 

The acid strengths and oxidizing abilities of the halogen oxoacids increase with the oxidation number of the halogen. The hypohalous acids, HXO (halogen oxidation number +1), are prepared by direct reaction of the halogen with water. For example, chlorine gas disproportionates in water to produce hypochlorous acid and hydrochloric acid ... 

The acid strengths and oxidizing abilities of the halogen oxoacids (Table 15.8) increase with the oxidation number of the halogen. The... 

The halogen oxoacids and oxoanions are produced by reaction of the halogens and their oxides with water. Most of the oxoacids are stable only in solution. Table 14.3 (next page) shows ball-and-stick models of the acids in which each atom has its lowest formal charge note that H is bonded to O. (We ll discuss factors that determine the relative strengths of the halogen oxoacids in Chapter 18.)... 

Perchloric acid, HCIO4, is the strongest of the halogen oxoacids, and hypoiodous acid, HIO, is the weakest. What two factors govern this difference in acid strength ... 

OCCURRENCE, PROPERTIES, AND USERS Table 28-5 Halogen Oxoacids and Their Salts... 

The relative strengths of the halogen oxoacids depend on the eletronegativity and the oxidation state of the halogen. We consider these factors quantitatively in Chapter 18. 

Our usual practice is to turn now to a consideration of the hydrides, oxides, oxoacids, and halides of the group. However, the chemistry of the halogen oxoacids is so extensive that Section 18.3 is entirely devoted to it. 

Another point to notice in Table 18.2 is that any given halogen oxoacid is a better oxidizing agent—that is, has a higher standard reduction potential—than its corresponding oxoanion. Take the HOCl/OCH case as typical. Equation (18.28) shows the half-equation for hypochlorous acid in acid solution ... 

Suppose for the moment that fluorine formed the acid that would be called, by analogy with the other halogen oxoacids, fluoric acid, HFO3. Draw Lewis stmc-tures for this fictional compound and analyze why it does not exist. 

The halogen oxoacids, except HCIO4, react with SO2 to yield halides and sulfate. The titration of SOs with excess CIO , followed by titrating the excess hypochlorite with I2, has been used to determine S. ... 

C6 Sc, Y, La to Lu Bromides. Iodides, Corresponding Basic Halides. Salts of Halogen Oxoacids and Alkali Double Salts - 1978... 

Of the rare earth compounds with halogen-containing oxoanions, the perbro-mates have not yet been prepared and the chlorites and chlorates have been studied only sporadically the other bromates and the iodates, perchlorates, and periodates are widely discussed in the literature. A comprehensive review on the oxohalogen compounds of Cl, Br, and I with the rare earths has appeared in the late 1970 s (Gmelin, 1977, 1978). The oxofluorides have been discussed in an earlier volume (Gmelin, 1976) only the ROF and related types of compounds are known and they fall outside the scope of this review. The TG and DTA data on rare earth perchlorates and iodates are discussed in Solomosi s comprehensive book (1977) on the structure and stability of solid halogen oxoacid compounds however, many important papers have been published since its appearance. 

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