For the coagulation of a negative sol,
Question:

For the coagulation of a negative sol, the species below, that has the highest flocculating power is:

1. $\mathrm{SO}_{4}^{2-}$

2. $\mathrm{Ba}^{2+}$

3. $\mathrm{Na}^{+}$

4. $\mathrm{PO}_{4}^{3-}$

Correct Option: , 2

Solution:

To coagulate negative sol, cation with higher charge has higher coagulation value.