ISSN:
0018-019X
Schlagwort(e):
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The solubilities of Cu2(OH)2CO3 (malachite) and Cu3(OH)2(CO3)2 (azurite) have been studied at 25° C in solutions of the constant ionic strength 0,2 M consisting primarily of sodium perchlorate. From experimental data the following values for equilibrium constants and Gibbs energies of formation are deduced:\documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{l} {\rm Malachite: }\log [{\rm Cu}^{2 + }]P_{{\rm CO}_2 }^{1/2} [{\rm H}^ + ]^{ - 2} = 6.74 \pm 0,0{\rm 4 (}I = 0,2{\rm M), 6},49 \pm 0,0{\rm 4 (}I = 0{\rm); \Delta }G_{298,2}^\circ = - 215,42 \pm 0,1{\rm 1 kcal}/{\rm mol}. \\ {\rm Azurite: }\log [{\rm Cu}^{2 + }]P_{{\rm CO}_2 }^{2/3} [{\rm H}^ + ]^{ - 2} = 6.72 \pm 0,0{\rm 3 (}I = 0,2{\rm M), 6},47 \pm 0,03{\rm (}I = 0{\rm); \Delta }G_{298,2}^\circ = - 341,99 \pm 0,1{\rm 2 kcal}/{\rm mol}. \\ \end{array}$$\end{document}Predominance area diagrams for the ternary system Cu2+—H2O-CO2(g), including CuO, Cu(OH)2, Cu2(OH)2CO3, Cu3(OH)2(CO3)2, Cu2+ and Cu (CO3)22-, are given.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/hlca.19680510805
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