Abstract
We have measured the second acid dissociation constant, K 2a , at several ionic strengths for hydrogen telluride (H2Te) using the Charge Transfer to Solvent (CTTS) uv spectra of its anions HTe− and Te2−. Since it is produced in our solutions, we have also determined the spectra of Te2 2− both in the uv and in the visible regions. At 25 ∘C, K 2a = (1.28 ± 0.02) × 10−12 by extrapolation to zero ionic strength. Its value at an ionic strength equal to 0.5 mol.dm-3 was estimated to be (8.7 ± 0.2) × 10−12. The solution thermodynamics of these species are also discussed and comparisons are made to related acids.
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Myers, R.J. Second Dissociation Constant of H2Te and the Absorption Spectra of HTe–, Te2– and Te2 2– in Aqueous Solution. J Solution Chem 36, 395–403 (2007). https://doi.org/10.1007/s10953-006-9112-3
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DOI: https://doi.org/10.1007/s10953-006-9112-3