

/ 





* 



188 EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 





« 



(corrected) ; hence, when the quantity of liquid in the fraction 94°-95° is considered 

 the corrected boiling point of the hydro-carbon may be estimated at something less 



95 



On combustion, 0.1297 grm. of the purified hydro-carbon gave 0.1688 grm. water, 

 and 0.4081 grm. carbonic acid. Or, 





Found. 



Carbon 85.81 

 Hydrogen 14.42 



Theory. 

 C14 85.71 



H14 14.29 



100.23 



100.00 





A determination of the vapor density of the purified fraction 93°-94°, gave the fol 

 lowing result : — 



Temperature of balance, 



" " oil-bath, 



Excess of weight of balloon, 

 Capacity of u 



Air remaining in " . 



Height of barometer, 

 Density of vapor found, 



* « " theoretical (C H H14) 



• • • 



17° 

 136° 



0.3845 grm. 

 219 c. c. 

 " 



757.2mm. a t 18" 



3.4445 

 3.389 



Hydride of (Enm&tyl = C M H 16 . At 97°-98°, as a summit, was a very well-marked 

 heap, the adjacent fractions, 96°-97° and 98°-99°, beintr also lar<re. while those next in 



o — -*• — o 



order fell off gradually upon either hand, — more rapidly, however, above 99° than 

 below 96°. Roughly estimated, the heap from 96° to 100° amounted to about 450 c. c. 

 The fraction 97°-98° having been analyzed before it had been subjected to any 

 chemical treatment, afforded the following result : 



0.2252 grm. of the hydro-carbon gave 0.2913 grm. water, and 0.6964 grm. carbonic 

 acid. Or, 



Found. 



« 



Carbon 84 32 

 Hydrogen 15.19 



■V 



09.51 



These figures agree with the improbable formula Cu H 



14 AA 15.2 



The fraction 97°-98° was now at once treated with monohydrated sulphuric acid. 

 The first portion of the acid blackened considerably, though the hydro-carbon itself 

 was at first only slightly colored ; this blackening was, however, not nearly so decided 

 as was the case with benzole. A portion of viscid matter also separated out and 

 adhered to the sides of the bottle; but only a slight amount of heat was evolved. The 



