| Autor: |
Giorgio Anderegg, S. Kholeif |
| Rok vydání: |
1993 |
| Předmět: |
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| Zdroj: |
Talanta. 41(9) |
| ISSN: |
0039-9140 |
| Popis: |
Different Debye-Huckel expressions for the activity coefficients of species in aqueous solution in the ionic strength range I = 0–3.5m (3M) are used for the extrapolation of equilibrium constants data to I = 0 and the interpolation to unknown I values. This may be accomplished using four or more values of the equilibrium constants that are equally well distributed on the I scale. The interpolated and extrapolated equilibrium constant values obtained are quite satisfactory and within the experimental error of the corresponding equilibrium constants. The values at I ⩽ 0.1 are very important as they can particularly influence the equilibrium constant value calculated at I = 0 and for which the error can reach 0.1 log unit or more. The values at I ⩾ 1.5 can also influence the extrapolated value at I = 0 and the interpolated value at a given I when an inadequate extrapolation model is selected. Among the expressions used, only those with two or more unknown parameters are suitable for such calculations. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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