8.8.3 Origination of charge (I)Ionization and unequal dissolution: proteins Silica sol: H, SiO3=2H*+ SiO3 OH R-CH-COOH clay, glass, soap, biological R-CH-CO0 2R-CH-CO0 NH NH3 NH, macromolecules Agl sol: dissolution of Agt is more readily The pH at which protein does not move than that of i under electric field is named as isoelectric point(1) Ionization and unequal dissolution: Silica sol: H2SiO3 = 2H+ + SiO3 2- clay, glass, soap, biological macromolecules AgI sol: dissolution of Ag+ is more readily than that of I￾proteins The pH at which protein does not move under electric field is named as isoelectric point. 8.8.3 Origination of charge