Silver cyanide complex

Electroplating. Most silver-plating baths employ alkaline solutions of silver cyanide. The silver cyanide complexes that are obtained in a very low concentration of free silver ion in solution produce a much firmer deposit of silver during electroplating than solutions that contain higher concentrations. An excess of cyanide beyond that needed to form the Ag(CN)2 complex is employed to control the concentration. The silver is added to the solution either directly as silver cyanide or by oxidation of a silver-rod electrode. Plating baths frequently contain 40—140 g/L of silver cyanide... 

Potassium cyanide forms a number of complexes. For example, in aqueous solution it reacts with silver in the presence of air or oxygen to form a silver cyanide complex ... 

In the cyanidation process the ore is crushed and roasted with sodium chloride and then treated with a solution of sodium cyanide. Silver forms a stable silver cyanide complex, [Ag(CN)2]. Adding metallic zinc to this complex solution precipitates sdver. 

Saito etal. [375] have also studied the mechanism of silver electrodeposition from silver-cyanide complex solutions. 

Another study relating emission intensity to temperature was performed by Assefa eta/. The system under examination involves Eu + and gold and silver cyanide complexes. This study is similar to that of Omary in that the intensity of the emission from [EuAu] decreases as... 

Ores of silver native silver, argentite, cerargyrite (horn silver). Metallurgy of silver cyanide process, amalgamation process, Parkes process. O mpoimds of silver silver oxide, silver chloride, silver bromide, silver iodide, silver ammonia complex, silver cyanide complex, silver thiosulfate complex, silver nitrate. 

Copper- and silver-cyanide complexes may also be analyzed using ion-pair chromatography. Owing to their low stability, however, some sodium cyanide is added to the mobile phase to shift the complexing equilibrium to the complex side. 

The following example of the silver cyanide complex (from the late Professor H. Diehl) illustrates how the calculation is made. 

General properties of Raman spectra of silver cyanide complexes 285... 

The chemistry of the silver cyanide bath is determined by a variety of silver cyanide complexes existing in the solution. The following equilibria for 25°C, are known in the literature [4, 5] ... 

Furthermore we discussed the possibility that the observed splitting of the CN" vibrations resulted from differences in the density of charge in respect to a variety of silver cyanide complexes. In an early paper Otto et al. [7] explained the trend... 

An example is the formation of the silver cyanide complex given by... 

Other complex ions formed by silver, such as the silver cyanide complex Ag(CN)2 and the silver thiosulfate complex Ag(S20a)2, have... 

Saito, A., Shibata, T., Ohura, H., and Migita, Y. (1998) Mechanism of silver electrodeposition from silver-cyanide complex solutions. Denki Kagaku., 66 (11), 1128-1134. 

Baltrunas, G. (2003) The mechanism of electrode process in the system silver/silver cyanide complexes. Elec-trochim. Acta, 48 (24), 3659—3664. 

The mechanism of electroreduction of silver cyanide complexes in aqueous electrolytes—11. Interpretation of SERS data. Electrochim. Acta, 42 (9), 1345-1350. 

Baltrunas, G. (1984) Chemical limitations of electroreduction of silver cyanide complexes. Vilnius University, PhD Thesis. Vilnius. 

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