058 



Dr. S. R, Milner on th 



III. 



Solution : -002 n. AgNO s in *2 n. HN0 3 . 

 Anode (2) A= 1*504 sq. cm. Temp. 22° C. 

 Current of 1*960 X 10"~ 3 ampere applied for 5 minutes 



V~caic. = '0586 log I0 {1 4- 14*78( Vt— ^t-b)} volt. 



Time from start 



V + CR A b 



V 



Diff. 



(rnins.). 



(obs.). 



(calc). 



017 



01694 



0-0498 



+0-1196 



77 



•1868 



•0671 



•1197 



1-92 



•I960 



•0781 



•1179 



4-97 



•2078 



•0896 



•1182 



5'00 



Current stopped. 



•0898 





5+ 50 



0-0854 



008-21 



+ -0033 



» 1-50 



•0790 



•0769 



+ 21 



„ 2-93 



•0746 



•0725 



+ 19 



,, 4-95 



•0700 



•0683 



+ 17 



„ no 



0619 



•0612 



+ 7 



„ 17-2 



•0569 



•0567 



+ 2 



„ 32-0 



•0503 



•0505 



_ 9 



„ 530 



•0448 



•0453 



s 



IV. 



Solution : 0*002 n. AgN0 3 in 0*2 n. HN0 3 . 

 Anode (1) A= 1*713 sq. cm. Temp. 23° C. 

 Current of 9*18 X 10~ 4 ampere applied for 20 minutes. 



V calc =0*0587 log 10 {l + 6*00(v^- Vt-20)} volt. 



Time from start 



Y+CE A b 



V 



Diff. 



(mins.). 



(obs.). 



(calc). 



1-00 



I 



0-1030 



00495 



+ •0535 



3-25 



•1126 



•0630 



•0496 



7-5 



1240 



•0712 



•052S 



19-95 



•1350 



0847 



•0503 



20-00 



j Current stopped. 



•0847 





20+0 60 



00804 



0-0805 



-■0001 



1-70 



•0780 



•0777 



+ 3 



3-20 



•0750 



•0752 



_ 2 



7-25 



•0700 



.0708 



8 



14 9 



•0647 



•0660 



- 13 



31-5 



•0579 



•0596 



- 17 



75-5 



•0491 



•0513 



- 22 



126 



•0439 



•0463 



- 24 



928 



•0254 



•0276 



- 22 



1 



