Frost Diagram Mn. Pourbaix diagram fig 5 13. Thermodynamic stability is found at the bottom of the diagram.
In short just by using frost diagram you cannot predict disproportionation of mn vii because if it were to disproportionate you will need mn viii which is not shown so frost diagram analysis only works for three points and you cannot say anything about the boundary values. In a frost diagram a proxy for the free energy relative to that of the free element oxidation state zero is plotted as a function of oxidation state. Here e is the reduction potential for the x n x 0 couple and n is the number of electrons transferred in the conversion of x n to x 0.
While every attempt has been made to insure the correctness of this handout no.
For example the line connecting mn 3 and mno 2 on the frost diagram has a slope of 0 95 the standard potential of mno 2 reduction to mn 3. Frost protected shallow foundations 2015 msbc chapter 1309 rev 170310 this handout is intended only as a guide and is based in part on the 2015 minnesota state building code as adopted by the city of bemidji as well as good building practice. A frost diagram is another way of displaying the reduction potentials for the various oxidation states of a given element x. To avoid ambiguity sometimes the points are labeled with the identity of the chemical species involved.
