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One method of preparation of colloid

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One method of preparation of colloid

Posted by Thachi Thachi 4 years ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 4 years ago

Chemical Methods of Preparation of Colloids

Hydrophilic or Lyophobic colloidal solutions can be prepared by various chemical techniques such as:

Double Decomposition Technique: When hydrogen sulphide is passed through a solution of arsenious oxide in distilled water, we get a colloidal solution of arsenious chloride.

As₂O₃ + 3H₂S → As₂S₃ + 3H₂O

Oxidation Technique: A colloidal solution of Sulphur is made to pass through an aqueous solution of sulphur dioxide. It can also be obtained by passing the gas through a solution of an oxidization agent such as bromine water as well as nitric acid.

SO₂ + 2H₂S → 2H₂O + 3S

H₂S + [O] → H₂O + S

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