The phenomenon of 'Mutual Coagulation' is an effective method to destroy colloidal stability. Which — Surface Chemistry Chemistry Question
Question
The phenomenon of 'Mutual Coagulation' is an effective method to destroy colloidal stability. Which of the following pairs of sols will rapidly precipitate when mixed in approximately equimolar proportions?
Answer: C
💡 Solution & Explanation
Mutual coagulation occurs when two sols of strictly opposite electrical charges are mixed. $Fe(OH)_3$ is a standard positively charged sol, while $As_2S_3$ is a standard negatively charged sol. Mixing them perfectly neutralizes their protective double layers, forcing massive precipitation.
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