576 
will not alter if the equilibrium at 7, remains the same. This liquid 
now must separate sulphur at f, ; the saturated solution must lie on 
4 S,Cl, 
the line 7DFU. Its composition is found by drawing from R a 
straight line through 4 until this intersects the solubility line TDFU, 
In this manner we find for the real composition of the saturated 
solution D, the corresponding gross composition is D,. 
100 
dO 
Composition of the 
saturated solution 
after heating 
60 
40 
20 
Composition of the original 
mixture. 
