Electronic Resource
Springer
Fresenius' Zeitschrift für analytische Chemie
157 (1957), S. 21-26
ISSN:
1618-2650
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary The formation and precipitation of cobaltferrocyanide has been studied by potentiometric titrations between cobalt nitrate and potassium ferrocyanide using ferricyanide-ferrocyanide electrode both by the direct and the inverse methods. The end point obtained from the maximum value of ΔE/ΔC corresponds to the formation of a compound having the composition 4Co2Fe(CN)2 · 3K4Fe(CN)6 with either of the substance used as the reagent. The titration curves have a regular shape, a sharp break in potential occurs at the end point and the results are accurate and reproducible. The effects of electrolytes and alcohol in varying concentrations on the end point as well as on the nature of the curves has been studied. In presence of 30% alcohol, the observed titre values closely approach the calculated points of equivalence required for the formation of the above compound.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00458077
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