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Preparation of colloidal solution----- 1 . …

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Preparation of colloidal solution----- 1 . Silver. 2 Sulphur Sol.?
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Yogita Ingle 4 years ago

Sulphur sol and gold sol are Lyophobic sols and are unstable and are build to colloidal size from small particles by the Condensation method by Chemical reactions.

 Oxidation sulphur sol is prepared by passing H2S into SO2

  1.  H2S + SO2 → S (sol) + H2

  2. Reduction of AuCl3 with formaldehyde gives gold sol.

    AuCl3+ HCHO + 3H2O → Au (sol) + 3HCOOH + 6HCl
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