Aqueous solution chemistry of sulfur, selenium and tellurium
المؤلف:
CATHERINE E. HOUSECROFT AND ALAN G. SHARPE
المصدر:
INORGANIC CHEMISTRY
الجزء والصفحة:
2th ed p 464
22-3-2017
2230
Aqueous solution chemistry of sulfur, selenium and tellurium
As we saw earlier in the chapter, the redox reactions between compounds of S in different oxidation states are often slow, and values of Eo for half-reactions are invariably obtained from thermochemical information or estimated on the basis of observed chemistry. The data in Figure 1.1 illustrate the relative redox properties of some S-, Se- and Te-containing species. Points to note are:
- the greater oxidizing powers of selenate and tellurate than of sulfate;
Fig. 1.1 Potential diagrams for sulfur, selenium and tellurium at pH = 0.
- the similarities between the oxidizing powers of sulfate, selenite and tellurite;
- the instabilities in aqueous solution of H2Se and H2Te.
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