112 



WORK OF E. G. MAHIN. 



A large amount of work has been done with the object of learning something about 

 the electrochemistry of organic solvents and of binary mixtures of these liquids. 

 This is especially true with regard to the relations existing between conductivity and 

 viscosity of solutions in such solvents. A full account of the work that has been 

 done in this laboratory has been published as a monograph by Jones 1 and coworkers, 

 and the electrochemistry of nonaqueous solvents has been extensively discussed by 

 Carrara. 2 



In the following pages are recorded the results of a few preliminary experiments, 

 which were made with the object of determining whether any essentially new prin- 

 ciples were to be discovered by increasing the number of components of a solvent 

 mixture from two to three. It would be, of course, impossible to predict whether or 

 not the mutual action of three solvents upon each other would be the average action 

 of the three possible pairs of components. No extensive study of this matter has, 

 as yet, been made. We have measured the viscosity of ternary mixtures of water, 

 methyl alcohol, ethyl alcohol, and acetone, and the conductivity of lithium nitrate 

 in these mixtures. (Tables 76 to 82.) The materials, apparatus, and method of 

 making the measurements were essentially the same as outlined in earlier articles. 

 The following example will serve to indicate the method of designating the solvent 

 mixtures: "Acetone (75 per cent methyl alcohol and water) " indicates a mixture of 

 solvents made by adding stated amounts (per cent by volume) of acetone to a mixture 

 of methyl alcohol and water which contains 75 per cent, by volume, of methyl alcohol. 



Table 76. Conductivity of Lithum Nitrate in Acetone {25, 50, and 75 per cent Methyl Alcohol 



and Water). 



V 



Acetone (25 per cent methyl alcohol and water). 



At 0, per cent acetone. 



Op.ct. 



25p.ct. 



50p.ct. 



75p.ct. 



100 p.ct. 



At 25, per cent acetone. 



Op.ct. 



25 p.ct. 



50 p.ct. 



75 p.ct. 



100 p.ct. 



10 

 50 

 100 

 200 

 400 

 800 

 1,600 



27.26 

 29.41 

 30.11 

 31.06 

 31.35 

 31.62 

 32.16 



23.08 

 24.50 

 26.07 



23.13 



26.60 

 27.37 



30.18 

 31.85 



28.91 

 29.27 

 29.73 



25.80 

 33.10 

 35.50 

 38.22 

 40.54 

 42.03 

 43.21 



9.67 

 14.07 

 18.1 

 23.8 

 30.6 

 43.4 



56.46 

 61.51 

 63.53 

 65.72 

 66.41 

 66.94 

 68.20 



48.07 

 51.65 

 55.43 



44.78 

 51.89 



53.88 



64.05 

 66.63 



57.42 

 58.21 

 58.40 



40.31 

 55.29 



59. 7S 

 64.80 

 6S.85 

 71.78 

 73.16 



10.87 



15.64 



19.5 



25.3 



32.4 



45.5 



59.8 



Acetone (50 per cent methyl alcohol and water). 



10 



50 



100 



200 



400 



800 



1,600 



10.87 



15.64 



19.5 



25.3 



32.4 



45.5 



59.8 



Acetone (75 per cent methyl alcohol and water). 



10 

 50 

 100 

 200 

 400 

 800 

 1,600 



10.87 



15.64 



19.5 



25.3 



32.4 



45.5 



59.8 



iCarnegie Institution of Washington Pub. No 80 (1907). *Ahren's Sammlung, 12, No. 11 (1908). 



