Q. Which of the following electrolyte will have maximum flocculation value for $Fe(OH)_{3}$ sol?
A) NaCl
B) ${Na}_{2}S$
C) $\left( {NH}_{4} \right)_{3}{PO}_{4}$
D) $K_{2}{SO}_{4}$
Explanation
(a)
Flocculation value$\propto \frac{1}{Coagulating\ power}$
$Fe(OH)_{3}$is a positively charged sol.
To coagulate$Fe(OH)_{3}$, negative charge electrolyte is used and greater the value of negative charge, coagulating power will be strong. Among the given electrolytes, NaCl has lowest coagulating power. So, its flocculation value will be maximum.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.