You are supplied with the following chemicals NaCl, BaCl2 , AlCl3 .
1. Which of these would you prefer most to coagulate a sample of As2S3 sol?
2. Arrange the following electrolytes in the increasing order of coagulating power.
NaCl, BaCl2 , AlCl3
3. Name and state the rule based on which you have arrived at the coagulating power of these substances.