Stability constants of NaSO4−, MgSO4, MgF+, MgCl+ ion pairs at the ionic strength of seawater by potentiometry |
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| Authors: | Bengt Elgquist Margareta Wedborg |
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| Affiliation: | Department of Analytical Chemistry, University of Göteborg, Fach, S-402 20 Göteborg 5 Sweden |
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| Abstract: | The stability of the ion pair NaSO4 was determined by measuring the change in sodium activity with medium composition at constant ionic strength, using a sodium-sensitive glass electrode. The stability constants of MgSO4 and MgCl+ were determined indirectly from measurements of the stability of MgF+ in different media. All measurements were performed at 1 atm pressure, 25 ± 0.1 °C and 0.7 M formal ionic strength. The stability constants for NaSO4?, MgSO4, MgF+ and MgCl+ are 1.8 ± 0.1, 6.3 ± 0.1, 22.9 ± 0.1 and 0.34 ± 0.02 M?1, respectively. |
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| Keywords: | To whom correspondence should be addressed. |
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