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The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged respectively. Which of the following statements is not correct?

(a) Mixing the sols has no effect

(b) Coagulation in both sols can be brought about by electrophoresis.

(c) Magnesium chloride solution coagulates the gold sol. more readily than the iron (III) hydroxide sol.

(d) Sodium sulphate solution causes coagulation in both sols.

1 Answer

Answer: Mixing the sols has no effect
 
As the two sols are oppositely charged mixing the sols would coagulate both of them.

 

answered Dec 14, 2013 by mosymeow_1
 
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