468 
spacial representation on the side plane KCl—BaCl, —CuCl, of the 
tetrahedron which projection may be easily deduced in the well 
known manner from the representation in space °). 
Fig. 1 gives a schematic representation of the equilibria occur- 
ring at 40°. 
The equilibria occurring in the ternary system BaCl, —CuCl, — 
Water are represented by the curves ab and be situated on the 
side plane BaCl,—CuCl, —Water. 
ab is the saturation line of the CuCl,.2H,O 
OC > » a ied! Ball, 200 
Cu hy 
Fig. 1. 
Tbe equilibria occurring in the ternary system: KCl—BaCl,— Water 
are represented by the curves cd and de situated on the side plane: 
KCl—BaCl, — Water. 
cd is the saturation line of the BaCl,.2H,O 
Dese: 5 3 tgs ARL 
The solution d is saturated with both salts. 
The curves ef, fg and ga situated on the side plane KCIl—CuCl,— 
Water represent the equilibria in the ternary system KCl—CuCl,—— 
Water. 
v f is the saturation line of the K Cl. 
FT Dae oi > ie ta Ee. 
0 DAN Pe ge he oe a 
Hence the solubility line of the double salt Dj22= CuCl,.2K Cl. 
2H, O is limited in point f by the occurrence of solid K Cl and in 
point g by the occurrence of solid Cu Cl H, 0. 
1) Z. f. Phys. Chem. 65, 563 (1909). 
