Group oxoacid salts

As with the salts of other oxoacids, the thermal stability of nitrates varies markedly with the basicity of the metal, and the products of decomposition are equally varied/ Thus the nitrates of Group 1 and 2 metals find use as molten salt baths because of their thermal stability and low mp (especially as mixtures). Representative values of mp and the temperature (I d) at which the decomposition pressure of O2 reaches 1 atm are ... 

The group oxidation state of +5 is too high to allow the formation of simple ionic salts even for Nb and Ta, and in lower oxidation states the higher sublimation energies of these heavier metals, coupled with their ease of oxidation, again militates against the formation of simple salts of the oxoacids. As a consequence the only simple oxoanion salts are the sulfates of vanadium in the oxidation states +3 and +2. These can be crystallized from aqueous solutions as hydrates and are both strongly... 

Many of the salts of nitrogenous bases (particularly of high nitrogen content) with oxoacids are imstable or explosive. There are separate group entries for AMINIUM lODATES AND PERIODATES, AMINIUM PERCHLORATES DIAZONIUM PERCHLORATES, DICHROMATE SALTS OE NITROGENOUS BASES I-(I,3-DISELENONYLIDENE)PIPERIDINIUM PERCHLORATES HYDRAZINIUM SALTS, HYDROXYLAMINIUM SALTS... 

Metal oxides containing single metalhc elements (binary oxides) and more than two metallic elements (double oxides and salts of oxoacids) are commonly used as catalysts in a variety of chemical reactions. Oxide and metallic catalysts are two major groups of industrial catalysts. In practice, most catalysts are produced from mixtures of more than two phases the phase primarily responsible for the catalysis is called the active component. 

The properties of alkali metal salts of most oxoacids depend on the oxoanion present and not on the cation thus we tend to discuss salts of oxoacids under the appropriate acid. However, we single out the carbonates and hydrogencarbonates because of their importance. Whereas Li2C03 is sparingly soluble in water, the remaining carbonates of the group 1 metals are very soluble. 

In this section, we give selected coverage of group 2 metal salts of oxoacids, paying attention only to compounds of special interest or importance. 

The anions of strong acids are the halide ions, except F , and those of strong oxoacids, such as N03 and C104. The cations of strong bases are those from Group 1 A(l) and Ca, Sr, and Ba from Group 2A(2). Salts containing only these ions, such as NaCl and Ba(N03)2, yield neutral solutions because no reaction takes place between the ions and water. 

Bismuth commonly forms cations of + 3 charge. It forms the basic oxide Bi20j and salts of oxoacids such as Bi2(S04)3 and Bi(N03)3- Reaction of the metal with hahdes such as fluorine and chlorine results in a salt with the formula of BiXj. Because of the size of the metal atom, the linkages are more ionic than those found for other group members. 

Anilides - Compounds derived from oxoacids R(C=0)(0H) by replacing the -OH group by the -NHPh group or derivative formed by ring substitution. Also used for salts formed by replacement of a nitrogen-bound hydrogen of aniline by a metal. 

---