THE POTENTIOMETRIC TITRATION OF CARBONATE SOLUTIONS CONTAINING URANIUM
Potentiometric titrations with hydrochloric acid were carried out on standard sodium carbonate solutions containing varying amounts of uranyl nitrate. The results confirmed the fact that uranium is present in such solutions as the complex ion [Formula: see text]. It was found that only the free CO 3...
| Published in: | Canadian Journal of Chemistry |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1953
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/v53-095 http://www.nrcresearchpress.com/doi/pdf/10.1139/v53-095 |
| Summary: | Potentiometric titrations with hydrochloric acid were carried out on standard sodium carbonate solutions containing varying amounts of uranyl nitrate. The results confirmed the fact that uranium is present in such solutions as the complex ion [Formula: see text]. It was found that only the free CO 3 −− is titrated with H + up to the first end point at pH = 8. 2. The complex ion is very stable and is decomposed only on further addition of acid when the complexed CO 3 −− along with the HCO 3 − in the solution is converted to carbonic acid before the second end point. The pH at which the second end point occurs is lowered from its normal value of 4.0 in the presence of uranium. This effect is attributed to hydrolysis of the UO 2 ++ ion. The necessary corrections for determining carbonate and bicarbonate in the presence of uranium are given. |
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