Question

two method for the preparation of colloids

Answer 1

You can prepare a colloidal solution by mixing a few fine Insoluble particles into the liquid.




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Answer 2

$\huge{\underline{\sf{\red{Answer-}}}}$

There are two methods for preparation of colloids :-

(I) condensation method :- this method based on condensation of simple molecules to make bigger particles of colloidal dimension.

$\small{\underline{\sf{\green{Example:-}}}}$colloidal sulphur is obtained by O2 gas in solution of H2S

2H2S + O2 —> 2H2O + S

(II) Dispersion method :- this method is based on breaking the particles of a ppt. Or suspension to get the particles of colloidal dimension.

$\small{\underline{\sf{\green{Example:-}}}}$colloidal solution of FeCl3 is prepared by adding a little ferric chloride Solution in freshly prepared. ppt of ferric hydroxide.