90℃におけるSO2-H2O系電位-pH図
90℃における電位-pH図 (第3報)
1973 年 89 巻 1024 号 p. 387-392
詳細
1973 年 89 巻 1024 号 p. 387-392
The potential and pH measurements of the SO2-H2O system were carried out at 90°Cby decreasing the pH of sulfate solutions (about 1g-ion/l) containing dissolved sodium sulfite (1, 0.1, and 0.01mol/l) or absorbed SO2 by the aid of a rotating Pt electrode, a glass electrode, and two reference electrodes (S. C. E.).
The results obtained were summarized in the potential-pH diagrams (Fig. 3 and 4). A large discrepancy between measured and calculated potentials, suggested that the potential of the system was not directly determined by the sulfate/sulfite redox reactions and that a certain oxidized or reduced intermediate species hould be taken into account. Redox reactions containing dithionate ion as such the species were discussed.
