C. E. Linebarger — Viscosity of Mixtures of Liquids 



(d.) The carbon bisulphide was purified by distillation over 

 dehydrated copper sulphate and mercury, when it was found 

 to have a constant boiling point. 



Table IY. 



Viscosity of Mixtures of Benzene {a. I) and Carbon Tetrachloride (e). 



Temperature 25°*0 



Percentage 



composition. 



CeU-e 0014 



0-000 100-000 



13-721 86-273 



40-780 "59-220 



58 600 41-400 



Molecular 

 percentage 

 composition. 



CeHe CCI4 



0-000 100-000 



23-860 76-140 



57-551 42-449 



73-605 26-395 



Specific 

 gravity. 



1-58828 

 1-42900 

 1-19309 

 1-07615 



Oalculated 

 viscosity. 



0-00843 

 0-00766 

 0-00715 



100-000 0-000 100000 0-000 0-87661 



Observed 

 viscosity. 



0-00883 

 000808 

 000706 

 00660 

 0-00599 



Diff. 



+ 0-00035 

 + 0-00060 

 + 000055 



{e.) The carbon tetrachloride had been fractionally distilled 

 over phosphoric anhydride after first being treated with strong 

 sulphuric acid ; it boiled at 76°'7 (uncorr.) under a pressure of 

 Y54nim ()£ mercury. 



Table Y. 

 Viscosity of Mixtures of Benzene {a. I) and Acetic Ether (/. /.) 









Temperature —25 



'•0 





Molecular 











Percentage 



percentage 



Specific 



Oalculated 



Observed 





composition. 



composition. 



gravity. 



viscosity. 



viscosity. 



DifE. 



OeHe C4H8O2 



OeHe O4H8O2 











0-000 100-000 



0-000 100 000 



0-89663 





000434 





15-594 84-406 



17-250 82-750 



0-89311 



0-00459 



000442 



+ 0-00017 



51-404 48-596 



54-411 45-589 



0-8.'^506 



0-00519 



000487 



+ 0-00032 



80-803 19-197 



82-605 17-395 



0-87982 



0-00567 



0-00551 



+ 000016 



100-000 0-000 100-000 0-000 0-87661 



0-00599 



{f I.) A kilogram of c. p. ethyl acetate was fractionally dis- 

 tilled until about a third of it was found to boil within a few 

 tenths of a degree. 



Table YI. 



Viscosity of Mixtures of Benzene {a. I) and Nitrobenzene (g). 



Temperature — 25°0 



Percentage 



composition. 



OeHe O6H5NO2 



0-000 100-000 



14-394 85-606 



37-610 62-390 



Molecular 

 percentage 

 composition. 



OeHs OeHsNOs 



000 100-000 

 20-956 79-044 

 48-735 51-265 



Specific 

 gravity. 



1-20200 

 1-14200 

 1 05620 



80-053 19-947 86355 13-645 0-92764 

 100-000 0-000 100-000 0-000 0-87661 



Calculated 

 attrition. 



001656 

 0-01369 

 0-00845 



Observed 

 attrition. 



0-01834 

 0-01417 

 0-01017 



DifE. 



+ 0-00239 

 + 0-00372 



000681 +000164 

 0-00599 



(g.) Commercial nitrobenzene was repeatedly crystallized in 

 fractions until an almost colorless product was obtained, which, 

 when solidified, showed the same temperature during the 

 remelting, viz : 3°*6 (uncorr.) 



