Bromates, BrO

Solubility silver, barium, and lead bromates are slightly soluble in water. 

To study these reactions use a 0.1m solution of potassium bromate. 

Concentrated sulphuric acid add 2 ml acid to 0.5 g solid bromate bromine and oxygen are evolved in the cold. 

Silver nitrate solution a white crystalline precipitate of silver bromate, AgBr03, is produced with a concentrated solution of a bromate. The precipitate is soluble in hot water, readily soluble in dilute ammonia solution forming a complex salt, and sparingly soluble in dilute nitric acid. 

The solution obtained after dissolving in ammonia should be discarded quickly to avoid a serious explosion (Cf. Section 3.6, reaction 1.) 

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The chlorine and bromine counterparts, chlorate, ClO-f, and bromate, BrO, have E° s that are even more negative. Hence these ions are even stronger oxidizing agents than iodate ion. 

BrO hypobromite BrO2 bromite BrO3 bromate BrO 4 perbromate... 

The solution must be in the pH range 10 to 14 to ensure that no other reactions take place in particular to avoid chlorate (ClOa") and bromate (BrOs") ion formation. 

For polyatomic bromine ions, the naming would be perhxomate (BrO ), bromate (BrO ), brom/te (BrO ), and hypohxovciite, (BrO ). Figure 9.2 shows some clues to help with chemical naming. 

Setup (a) Chlorine, bromine, and iodine (members of group 7A) all form analogous series of oxoanions with one to four oxygen atoms. Thus, the reference oxoanion is bromate (BrO J), which is analogous to chlorate (CIO J). In parts (b) and (c), HCO J and H2CO3 have one and two more hydrogens, respectively, than the carbonate ion (CO ). 

The interaction between bromate (BrO ) and dichromate ions, in nitrate melt has been studied elsewhere. The studies permit estimation of relative acidities of some 0x0-... 

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