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Updated: Mar 17, 2026
08:43
Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
7.3K
Hydrolysis of thorium(iv) at variable temperatures.
P L Zanonato1, P Di Bernardo1, Z Zhang2
1Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, I-35131 Padova, Italy. pierluigi.zanonato@unipd.it.
Dalton Transactions (Cambridge, England : 2003)
|July 28, 2016
Summary
The hydrolysis of Thorium(IV) increases significantly with temperature due to water
Area of Science:
- Inorganic Chemistry
- Solution Chemistry
- Thorium Chemistry
Background:
- Thorium(IV) hydrolysis is crucial for understanding its behavior in aqueous solutions.
- Temperature-dependent studies are essential for predicting speciation under varying conditions.
Purpose of the Study:
- To investigate the hydrolysis of Thorium(IV) in tetraethylammonium perchlorate.
- To determine hydrolysis constants and enthalpies at different temperatures.
- To evaluate methods for estimating equilibrium constants at varying temperatures.
Main Methods:
- Potentiometry
- Microcalorimetry
- Specific Ion Interaction Approach
Main Results:
- Three hydrolysis reactions, (n,m) = (2,2), (8,4), and (15,6), were identified.
- Hydrolysis constants increased significantly with temperature (3-11 orders of magnitude).
- All studied hydrolysis reactions are endothermic at 298 K.
Conclusions:
- Temperature significantly enhances Thorium(IV) hydrolysis, primarily due to increased water ionization.
- Hydrolysis constants at infinite dilution were determined.
- The study evaluated different approaches for temperature-dependent equilibrium constant estimation.
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