110 THE ROYAL SOCIETY OF CANADA 



A silver cathode was tried with another solution of acetone and 

 water as above. A metallic deposit was at first obtained but on 

 continued electrolysis the results were similar to those obtained with 

 the platinum. 



It appears from the foregoing results that iron can be completely 

 deposited from its solution in acetone, acetone and water, and acetone 

 and alcohol. In the case of the acetone or acetone and water the 

 deposit was quite free from carbon. It seemed further, that, if the 

 resistance of the solution could be kept low enough, we should be 

 able to get all of the iron down in the metallic form, when it could be 

 accurately weighed. We were continually troubled, however, with 

 the poor conducting power of the solution. In a further attempt to 

 eliminate this difficulty we added ammonium sulpho-cyanide to the 

 solution. 



Experiment 7 . 1. gram of ammonium sulpho-cyanide was added. 

 The solvent was 2 parts acetone to 1 of water. The current density was 

 now NDioo = 0- 1 ampei^e with a force of 3 volts. The resistance was 

 comparatively low but large volumes of gas were given off at both 

 anode and cathode. A part of the iron was deposited but we were 

 soon troubled by the presence of the yellow substance noticed by 

 Laszczynski.^ A very disagreeable odor characterized the solution. 



Experiment 8. Electrolysis of Ferrous Sulphate in Water and 

 Acetone. A solution of ferrous sulphate in one part of acetone and two 

 parts of water was subjected to electrolysis using 0-1 ampere at 

 4- 7 volts. A gray deposit of metallic iron was formed. A point was 

 then reached where no more iron could be deposited without increasing 

 the current. On raising the voltage the heavy red deposit before 

 noted was again formed. All of the iron was deposited from the 

 solution. 



A silver cathode instead of the platinum gave almost identical ' 

 results. 



.-.gain we were troubled by the high resistance of the solution. 

 To remove this difficulty 1 gram of ammonium sulphate was added to 

 a second solution prepared as above. This solution was electrolysed 

 with a difference of potential of 4-0 volts and current density of 

 NDioo = 0-l ampere. It was found that all of the iron could be 

 deposited from this solution as gray, adherent, weighable, metallic 

 iron. As the electrolysis continues the acidity of the solution increases 

 and it was found necessary to neutralize a part of the acid from time 

 to time by adding ammonium hydroxide. 



Having shown that all of the iron could be deposited from the 

 acetone solutions, it was thought worth while to examine the solutions 



'Loc. cit. 



