Question

हार्डी-शुल्जे नियम (Hardy-schulze Rule)-​

Answer 1

this laws have major two points pointer number 1 more is the charge on the ions more will be the coagulation power

2. always opposite charge of the electrolyte will neutralize the colloidal solution

Answer 2

Explanation:

According to Hardy Schulze rule:

1. The effective ions of the electrolyte in bringing about the coagulation are those which carry opposite to that of the colloidal particles. These ions are called coagulating ions or flocculating ions.

2. Greater is the valency of the coagulating ion, greater is its power to bring about the coagulation.

Thus in order to coagulate a negatively charged sol, the positive ions $Al^{3+}$ will be most effective among $Al^{3+}$ , $Mg^{2+}$ and $Na^{+}$

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