Hydrolysis of Co(II) at elevated temperatures
Hydrolysis of Co(II) has been studied up to 200 °C using a concentration cell with liquid junction of the type Pt(H 2 )|H + (a 1 )||H + (a 2 )|(H 2 )Pt. The effect of varying the initial solution pH and cobalt concentration has been studied at different ionic strengths. The hydrothermal hydrolysis f...
Gespeichert in:
| Veröffentlicht in: | Canadian journal of chemistry 1978-02, Vol.56 (4), p.435-440 |
|---|---|
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | Hydrolysis of Co(II) has been studied up to 200 °C using a concentration cell with liquid junction of the type Pt(H
2
)|H
+
(a
1
)||H
+
(a
2
)|(H
2
)Pt. The effect of varying the initial solution pH and cobalt concentration has been studied at different ionic strengths. The hydrothermal hydrolysis for cobalt solutions between pH 3.9 and 9.6 is consistent with the equilibrium Co
2+
+ H
2
O → CoOH
+
+ H
+
. Higher hydrolytic species are not important. Hydrolysis increases with temperature and produces a buffering action at 200 °C. Thermodynamic quantifies for the hydrolysed species are reported. |
|---|---|
| ISSN: | 0008-4042 1480-3291 |
| DOI: | 10.1139/v78-069 |