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- W1990283035 abstract "Abstract Thermometric titrimetry data for the Fe 3+ /SCN − system show that, for a titrate concentration in the range 0.0020–0.0024 mol dm −3 and a titrant concentration of 0.1000 mol dm −3 , the measured molar reaction heat corresponding to the first end-point formation is −4.42 ± 0.52 kJ mol −1 and the corresponding mean mole ratio factor, n Fe 3+ / n SCN − is 1.04 ± 0.04. However, for titrate concentrations in the range 0.0010–0.0020 mol dm −3 , this factor is less than unity but progressively approaches unity as the titrant concentration nears 0.0020 mol dm −3 . This phenomenon is explained in terms of a thermal bleaching effect and is demonstrated by the use of an inhibitor in these thermometric titrations. Al 3+ and Mn 2+ cause no measurable interference effect in the Fe 3+ /SCN − thermometric titration. A thermometric titration with Ag + (0.0007–0.0030 mol dm −3 ) as titrate and SCN − (0.1000 mol dm −3 ) as titrant reveals one end-point-the corresponding measured molar reaction heat is −86.65 ± 3.85 kJ mol −1 and n Ag + / n SCN − is 0.97 ± 0.02. Al 3+ causes no measurable interference effect in this titration. The overall thermoanalytical data obtained for these two systems suggest that thiocyanate can be used as a reagent for the determination of Fe 3+ and Ag + in aqueous solution by thermometric titrimetry." @default.
- W1990283035 created "2016-06-24" @default.
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- W1990283035 date "1989-11-01" @default.
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- W1990283035 title "A thermometric titrimetry study of Fe3+/S0CN− and Ag+/SCN− systems" @default.
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- W1990283035 doi "https://doi.org/10.1016/0040-6031(89)87117-5" @default.
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