Question: For the coagulation of a negative sol, the species below, that has the highest flocculating power is:
$\mathrm{SO}_{4}^{2-}$
$\mathrm{Ba}^{2+}$
$\mathrm{Na}^{+}$
$\mathrm{PO}_{4}^{3-}$
Correct Option: , 2
Solution:
To coagulate negative sol, cation with higher charge has higher coagulation value.
