8.8.3 Origination of charge (2)Adsorption Agl sol: AgNO3+ KI: Agt, I,k, NO3- Agl, when prepared by adding ki into dilute AgNO, solution, positively charged AgI sol can be prepared. When adding AgNO3 into KI (AgI)m solution, negatively charged Agl sol was btained Fajans rule of preferential adsorption Co-ions/similiions: counterions Sols preferentially adsorb ions comprising itself, and then the ions with higher chargesAgI, when prepared by adding KI into dilute AgNO3 solution, positively charged AgI sol can be prepared. When adding AgNO3 into KI solution, negatively charged AgI sol was obtained. Fajans rule of preferential adsorption AgI sol: AgNO3 + KI: Ag+ , I− , K+ , NO3 − Sols preferentially adsorb ions comprising itself, and then the ions with higher charges. Co-ions /similiions; counterions (AgI)m I - I - I - (2) Adsorption 8.8.3 Origination of charge