Polarization at a Metallic Anode. 



659 



In experiment V. the concentration o£ the silver nitrate was 

 reduced to one tenth of its value in the previous four. A 

 considerable increase in the polarization both in theory and 

 practice is the result, as may be seen by comparing the 

 results with those of III., the current and its time of appli- 

 cation being roughly the same in both experiments. 



V. 



Solution : 



0002 n. AgNOs 



in 



2n. HN0 3 . 

 Anode (2) A = 1*504 sq. cm. Temp. 19°*2 0. 

 Current of 1*925 x 10~ 3 ampere applied for 6 minutes. 



calc 



= •O5801og 10 {l + 150-2( v /^ -<v/*-6)} volt. 



Time from start 



V4-CRab 



V. 



Diff. 



( mixta.). 



(obs.). 



(calc). 



112 



0-2486 



0-1279 



+ 0*1207 



267 



•2564 



•1387 



•1177 



483 



•2630 



•1461 



•1169 



6-00 



Current stopped 



•1489 





6+ 0-67 



01402 



01407 



- -0005 



., 192 



•1346 



•1351 



- 5 



„ 3-50 



•1301 



•1313 



12 



„ 60O 



•1254 



•1259 



5 



„ 120 



T182 



•1200 



18 



., 23-45 



•1101 



.1129 



- 28 



„ 468 



•1011 



•1049 



- 38 



„ 84-0 



•0934 



•0982 



48 



The following are the values of Rab> the resistance between 

 the two electrodes, calculated as described on p. 655 for each 

 of the two anodes and tubes used. 



Anode (1). 

 Exp. 1 57*3 co. 



IV. 



5G-1 



Anode (2). 



Exp. II 59*8 w. 



„ III 60*7 



The two numbers agree well with each other in each case, 

 and are in accordance with the approximate measured value 

 for anode (1) given on p. (555. The variations correspond to 

 differences of only '002 volt between the observed and the 

 calculated polarizations. In exp. V., with anode (2), 

 1^ab= 61*6 a; the slightly higher value of the resistance in 

 this case i< partly accounted for by the smaller concentration 

 of silver nitrate used. 



The results of two experiments in which the polarizing 



