what is meant by electrodispersion of metals? (surface chemistry)

Asked by sangavi v.p | 14th Aug, 2011, 12:00: AM

Expert Answer:

This method is used to prepare Sols of metals such as Platinum, Silver, Copper or Gold. The metal whose sol is to be prepared is made as 2 electrodes immersed in dispersion medium such as water. The dispersion is kept cooled by surrounding it with a freezing mixture. An electric arc is struck between the electrodes. This creates tremendous heat generated by the arc vapourises the metal which are condensed immediately to liquid to give a colloidal solution. This Colloidal solution  is stabilized by adding small amount of KOH to it.

Answered by  | 16th Aug, 2011, 06:06: PM

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