Question

Out of AlCl3 and MgCl, which is more effective in causing coagulation of a negative sol? Give reason.

Answer 1

according to the Schulze-Hardy rule , the effectiveness of the salt causing flocculation depends on the charge on the solution particles , the greater the magnitude of the opposite charge , the higher the ability of a salt to coagulate the solution .

thus, trivalent salt AlCl3 is more effective in causing the coagulation of a -vely charged solution than the divalent salt MgCl2