228 



REV. S. M. JOHNSTON 



To test this assumption, I turned to non-electrolytes to see what values of the 

 elevation constant these would give. For such salts molecular, as distinct from ionic, 

 values of the constant are obtained, there being little or no ionization. Except* 

 in one or two instances, the values obtained were not anything like so large as the 

 above assumption would require. 



Mannite. 



Tartaric Acid. 



Gratis. Salt 



added to 50 c.cs. 



Water. 



Elevation 



of Boiling 



Point. 



Elevation 

 Constant. 



Grms. Salt 



added to 15 c.cs. 



Water. 



Elevation 



of Boiling 



Point. 



Elevation 

 Constant. 



•4808 



•143 



530 



•2566 



•033 



489 



■9552 



•171 



536 



1-1542 



•168 



541 



1-1346 



•191 



536 



2-3444 



•344 



545 



1-8936 



•226 



535 



3-2162 



•484 



559 



2-3536 



•254 



530 



4-5206 



•687 



563 



2-7486 



•278 



537 



6-8758 



1-079 



582 



3-2046 



•305 



536 



8-4976 



1-349 



588 



3-8536 



4-2782 



•344 

 •367 



537 

 537 















4-7340 



•396 



538 









5-3976 



•429 



537 









5-8546 



•459 



537 









6-3432 



•490 



538 









6-8672 



•520 



535 









C 



ane Sugar. 

















Boracic Acid. 





Gnus Salt 



added to 50 c.cs. 



Water. 



•2500 



Elevation 



of Boiling 



Point. 



Elevation 

 Constant. 



Grms. Salt 



added to 50 c.cs. 



Water. 



Elevation 



of Boiling 



Point. 



Elevation 

 Constant. 



•045 



855 









•7238 



■095 



938 



•7516 



•131 



520 



11906 



•189 



969 



2-2096 



•512 



532 



1-8944 



•229 



978 



4-4920 



•911 



561 



2-5644 



•289 



998 



7-5972 



1-485 



562 



We shall now consider the results obtained from electrolytes which dissociate but 

 little. 



Cadmium idiode and cadmium chloride are electrolytes which dissociate slightly 

 at ordinary concentrations. Consequently we should expect, on the above explanation, 

 that high values of the elevation constant would be obtained, there being many 

 molecules and few ions in a solution. On the contrary, ordinary values of the constant 

 were obtained, as will be seen from the following tables : — 



* See Cane Sugar. 



