44 



Journal of the Asiatic Society of Bengal. [February, 1910. 



nickel plates used in previous experiments were thick- 



A fresh 



wi 



nickel to ensure their purity. 



ly electro-plated 

 quantity of nickel sulphate solution was prepared from puri- 

 fied crystals, digested with nickel carbonate and filtered. 

 Specific gravity of the neutral solution was found to be 1'336 

 at 18 C. The volume of solution taken for the experiments 

 was 160 c. c. Tfc 



was 



known 



at ions were 



taken at the end of each experiment both for cathode gain 

 and anode loss, and the corresponding e.c.e.'s were determined 



from the two sets of data. 



The results are given below. 



Table L 



Effect of successive determination on a given Solution 



Second. 



Ampere. 



Ca. Gain. 



An. Loss 



E. C E. 



E. C. E. 







(grin.) 



(grm.) 



(ca) 



(An) 



840" 



•8669 



•2118 



•0107 



•0002908 



0000147 



840" 



•8664 



•1867 



•0097 



•0002572 



0000 1 3 3 



840* 



•8735 



1001 



•0117 



•000 1 363 



0000159 



740" 



•8675 



•0903 



0113 



0001334 



•0000168 



840" 



•8923 



•0974 



0109 



000 1 300 



0000145 



840" 



•8925 



•0716 



•0123 



•0000955 



0000164 



840" 



•8945 



0710 



•0211 



0000944 



•0000280 



840" 



•8875 



0575 



0243 



•0000771 



0000326 



840" 



•8820 



•0573 



•0256 



•0000772 



•0000345 



840" 



•8825 



0516 



•0160 



•0000597 



0000216 



1 800 " 



•8807 



•1135 



.0616 



00007 1 6 



0000389 



1800" 



•8773 



1195 



•0706 



•0000756 



•0000447 



1800" 



* ^- — — 



•8741 



•1038 



0673 



■ 0000 660 



•0000428 



1800* 



j -8738 



•0985 



•0663 



•O00OU22 



0000422 



1800" 



•9222 



•1092 



•0726 



•0100657 



0000437 



1800" 



fft^h ^^fc ^bw - 



•8854 



1041 



0740 



•0000633 



•0000454 



1800" 



•8323 



•0879 



0670 



•0000586 



0000447 



1800' 



Mflk ^ft^h. ^k ^^h 



•8854 



•0986 



•0796 



•0000615 



•0000500 



1 800" 



•8629 



0930 



•0736 



•0000598 



0000473 



3600" 



•8853 



•1903 



•1556 



•0000597 



•0000488 



From the above results 



ted from 



times 



the average value of the e.c.e. 

 ) current was passed are calcula- 

 w iins and anode losses for these 

 intervals and the mean values of the current over these times. 

 The results are given in Table II. 



cathode 



