calculation from literature values with standard SSA and SSD at ionic strength of 1M, log K for Aerosil in brackets for Cabosil content »Si-O<1-> + Ag<1+> = »Si-O-Ag logK = 6.0(5.5) »Si-OH = »Si-O<1-> + H<1+> pK2 = -logK = 7.0 sum »Si-OH + Ag<1+> = »Si-O-Ag + H<1+> logK= 6.0(5.5) -7 = -1.0(-1.5)