ELECTEOMOTIVE FORCE OF SILVER NITRATE 

 CONCENTRATION CELLS* 



lest- 1 

 eons >^ 



BY JAMES M. BELL A^'D ALEXANDER L. FEILD 



The electromotive forces of concentration cells — two 

 aqueous solutions of silver nitrate between silver electrodes, 

 Ag/AgNOg/AgNOg/Ag — have been measured by Miesler/ by 

 Nernst,- by Negbaur,^ by Cumming and 

 Abegg,'* and by Cybulski and Dunin- 

 Borkowski.^ Non-aqueous solutions 

 have been emj)loyed in similar measure- 

 ments by Bodlander and Eberlein,^ by 

 Neustadt and Abegg,''' and by Roshdest- 

 wensky and Lewis,^ the non-aqueou= 

 solvents being ethylamine, methylamine, 

 methyl alcohol, ethyl alcohol, acetone 

 and pyridine. 



The present paper contains results 

 of measurements of the electromotive 

 force in aqueous solutions and in ethyl 

 alcohol solutions over a wider range of 

 concentrations than heretofore used. 



The water used in making up the so- 

 lutions was distilled several times and 

 had a low conductivity. The ethyl alco- 

 hol stood several days over quicklime 

 and was then distilled from barium ox- 

 ide. Baker's analyzed silver nitrate 

 was used, the impurities present being 

 negligible in amount. 



The cell is shown in the figure, and 

 consists of a U-tube with outlet tube and 



* Reprinted from the Journal of the American Chemical Society, Vol. XXXV. 

 No. 6. June, 191.3. 



^ Monatshefte, 8, 193, 365 (1887); J. Chem. Soc, 52, 1073 (1887); 54, 13 

 (1888). 



-Z. physik. Chem., 4, 155 (1889). 



3 TTJerf. Ann., 44, 737 (1891). 



*Z. Elektrochem., 13, 18 (1907). 



^An.::. Akacl. Wiss. Krattkau, 1909, 660. Chem. Zmtr., 1909, II, 1295, 



«Ber.. 36, 3945 (1903). 



'Z. physik. Chem., 69, 486 (1909). 



sj. Chem. Soc, 99, 2138 (1911). 



45 



