Stability constants of iron(III) borate complexes |
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Authors: | Jane A Elrod Dana R Kester |
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Institution: | (1) Graduate School of Oceanography, University of Rhode Island, 02881 Kingston, Rhode Island |
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Abstract: | The ultraviolet absorbance data from experiments conducted at constant pH and total iron concentration but variable B(OH)3 concentration were used to determined the stability constants of FeB(OH)
4
2+
and FeB(OH)4
2
+
at 25°C and an ionic strength of 0.68. The estimates obtained were *1 = 1.0 ± 0.2 × 10–2 and *2 = 2 ± 1 × 10–5, respectively (uncertainties are two times the standard error of the estimates). A calculation of the extent of iron(III) borate formation in ocean water at pH 8.2 shows that iron(III) borates are not a significantly large component of iron(III) speciation in seawater. |
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Keywords: | Ferric iron ferric borate stability constant ultraviolet spectroscopy complexes |
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