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- W1971736641 abstract "The exchange reaction 2R+HCO32− + CO32− ⇌ R2+ CO32− + 2HCO32− has been studied on Dowex 1 × 8 in the presence of bicarbonate solution in equilibrium with atmospheric carbon dioxide (open system). The experiments showed, as theory predicts, that the composition of the resin phase is independent of the concentration of the bicarbonate solution. The mole fraction of carbonate at equilibrium is about 0.4 and the equilibrium constant is 0.15M at 20°. With this value of the constant, the composition of the ion-exchanger for various bicarbonate concentrations has been calculated for a closed system. At [HCO3−] < 0.01M a substantial part of the resin is in the carbonate form, whereas for [HCO3−] ⪢ 0.05M the resin is present almost exclusively in bicarbonate form. The exchange constants of bromide at trace level have been determined for the bicarbonate and mixed carbonate forms of the ion-exchanger. The exchange constant KClHCO3 has been determined over the whole composition range and the results can be represented by KClHCO3= 0.428 −0.063xCl −0.115xCl2, where XCl is the mole fraction of chloride in the resin. The constants are used to discuss the conditions for the Chromatographie enrichment of bromide from fresh water." @default.
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- W1971736641 date "1984-07-01" @default.
- W1971736641 modified "2023-10-16" @default.
- W1971736641 title "Exchange equilibria between bicarbonate, carbonate, chloride and bromide on dowex 1 × 8" @default.
- W1971736641 cites W1975390331 @default.
- W1971736641 cites W1987111680 @default.
- W1971736641 doi "https://doi.org/10.1016/0039-9140(84)80132-0" @default.
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