Because the aggregation ability of electrolyte mainly depends on the valence of ions with opposite charge to colloidal particles, specifically, the aggregation value is inversely proportional to the sixth power of the valence of heteroelectric ions. If it is a positive sol, the aggregation values of nitrate and sulfate (valence 1, valence 2) should be 60 times different.

If it is a negative sol, it is more reasonable ~ sodium ion is monovalent. Compared with sodium nitrate with the same concentration, the concentration of sodium ion is twice, so the sedimentation value is half ~ aluminum ion is trivalent, so it is about 100:0. 14 ~ Why is magnesium ion divalent instead of 100: 1?