ABSTRACT
aMetal chelating systems can be viewed as metal ion buffer systems.
MY = metal chelate complex; M is metal and Y is chelating agent. Metal ion are electron acceptors can be viewed as Lewis acids while chelating agents donate electrons and are Lewis bases. Also, chelating agents are polydentate
MYn–m = M+n + M–m
KMY = [MYn+m]/[M+n][Y–m]
pM = log KMY + log [Y–m]/[MYn–m]
