133 
Chemistry. — “The Application of the Theory of Allotropy to 
Electromotive Equilibria’. V 5) By Prof. A. Sirs and Dr. A. H. 
W. Aten. (Communicated by Prof. J. D. van per Waats). 
(Communicated at the meeting of May 27, 1916). 
1. Lntroduction. 
In our preceding communication we introduced a new view of 
electromotive equilibria, which is based on the assumption that the 
electrons in a metal phase and in the coexisting electrolyte behave 
as ions. 
Starting from these suppositions we have discussed among other 
things also the potential difference metal-electrolyte, in which new 
relations were obtained. 
In the derivation of these relations the case was supposed (first 
case) that the metal was built up exelusively of metal atoms, univalent 
metal ions and electrons. Now we will in the first place consider 
the case that the metal consists of atoms, »-valent metal ions and 
electrons, after which we shall proceed to the second case that in 
the metal there are present by the side of atoms and electrons, 
metal ions of different valency. 
2. The metal consists of metal atoms, v-valent 
metal ions, and electrons. 
The equilibrium between metal and electrolyte can now be 
represented by: 
Ms Ms + v6 5 
4) : 
Mra My + vO1 
We then get the two following relations for the potential difference : 
| ee CM 
B veeg eri selen oll EE) 
F . 
and 
DU — VU u U 
Ss - Bs aa, ‘s RA ie Sadet denn 
vi F 
If we again split up the mol. thermodynamic potential as follows: 
jk Fe A CREE De oen en 
and if we put: 
ee 2 Al | == OS ROT PRM Ss 
u ue My RT In K )». (4) 
1) In the preceding communication IL had been erroneously put for IV. 
