G. Walrafen, D. Irish, T. F. Young
Aug 1, 1962
Citations
0
Influential Citations
56
Citations
Journal
Journal of Chemical Physics
Abstract
Raman intensities and frequencies of molten potassium bisulfate, obtained in the temperature range of about 300° to 700°C, provide evidence for the reactions 2HSO4−→S2O72−+H2O and S2O72−→SO42−+SO3. Between 300° and 620°C the HSO4− concentration, inferred from Raman intensities, decreases rapidly. Simultaneously, the S2O72− concentration increases and becomes maximal at 500°C. Above 500°C the S2O72− concentration decreases, and Raman lines of SO42− appear. Analyses of gaseous and solidified products indicate that the production of SO42− is accompanied by the evolution of SO3.Raman frequencies and polarizations of HSO4− ion obtained at temperatures ranging from the melting point to 620°C have been compared with the corresponding quantities obtained from studies of aqueous solutions. Differences observed are discussed in terms of hydrogen bonding. Raman spectra of molten potassium bisulfate obtained at ∼620°C provide vibrational frequencies of S2O72−. The number of Raman frequencies observed, polarizations o...