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A sol has positively charged colloidal particles. Which of the following solutions is required in lowest concentration for coagulation?

(a) $NaCl$

(b) $K_4[Fe(CN)_6]$

(c) $ZnCl_2$

(d) $Na_2SO_4$

1 Answer

Answer: $K_4[Fe(CN)_6]$
According to Hardy Schulze rule, the ion having opposite charge to sol particles cause coagulation and greater the valency of the oppositely charged ion more is the coagulating power.


answered Dec 14, 2013 by mosymeow_1

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