and Attacked Water. 



29 



The following table shows the temperatures at which 

 turbidity begins and ceases in aqueous solutions of triethyl- 

 amine of various strengths. (See also fig. 1, a Triethylamine 

 and Water as liquids.") 



Table XLIX. 

 Separation in Aqueous Solutions of Triethylamine. 







Critical 





Per cent, of 



Per cent, of 



temperature 



Remarks. 



Triethylamine. 



water. 



between clearness 







and turbidity. 





1-96 



98-04 



73 { 



Becomes clouded, and be- 

 gins to boil. 



3-85 



96-15 



41 





5 



95 



34 





8 



92 



23-5 





10 



90 



21-3 





15 



85 



18-8 





18 



82 



186 





20 



80 



18-6 





30 



70 



18-2 





40 



60 



18-4 





4646 



53-54 



18-3 





50 



50 



18-4 





70 



30 



171 





80 



20 



13-4 





90 



10 



6-1 





94-5 



5-5 



— 7 (about) 





99 



1 



{ 



Complete liquid solubility 





at all temperatures. 



A solution containing only 099 per cent., sealed in a very 

 strong glass tube and heated to 200° C, did not show any 

 opalescence. 



A 1'96-per-cent. solution begins to give off bubbles of gas 

 at the same temperature at which it becomes turbid. A still 

 more dilute solution, namely a 099 per cent., does not become 

 turbid at 200° C, when it is heated in a sealed tube. The curve 

 (fig. 1, " Triethylamine and Water as liquids ") shows the re- 

 lationship above examined. The following example illustrates 

 the his to ry of a solution. Ten grams of ethylamine and 90 

 grams of water, shaken together at 25°, form a white emulsion. 

 On standing at that temperature, two transparent layers are 

 formed, of which the upper is ethylamine saturated at 25° 

 with water, and the lower water saturated at 25° with ethyl- 

 amine. On heating to 28°, both layers become turbid ; the 

 upper sheds water saturated at 28° with ethylamine, which falls, 

 and the lower ethylamine saturated at 28° with water, which 

 rises. These new quantities join their respective camps, the 

 constitution of which has, of course, been altered by the 



