114 Prof. W. Ostwald's Electrochemical Researches, 

 Selenious Acid, H 2 8e0 3 . 



p. 



v. 



m v 



m. 2 . 



m. • 



log tan m. 



Diff. 



1 



2 



7-636 



7-642 



7-639 



9-1275 



01070 

 0-1184 

 0-1215 

 01261 

 01296 

 0-1336 

 0-1380 

 01414 

 01458 



2 



4 



9-752 



9-720 



9736 



9-2345 



3 



8 



1273 



12-66 



12-70 



9 3529 



4 



16 



16-57 



16-62 



16-60 



94744 



5 



32 



21-75 



21-73 



21-73 



9-6005 



6 



64 



28-25 



28-23 



28-24 



9-7301 



. 7 



128 



36-23 



36-07 



36'15 



9-8637 



8 



256 



4521 



4500 



45-11 



0-0017 



9 



512 



54-44 



54-10 



54-27 



01431 



10 



1024 



63-00 



6258 



62-79 



0-2889 



11 



2048 



69-80 



69-00 



69-40 







12 



4096 



73-98 



73-18 



73-58 







The behaviour of selenious acid is very similar to that of a 

 monobasic acid, especially that of monochloracetic acid. If 

 the numbers are divided by 2, the results represent the con- 

 ductivities referred to an equivalent weight of selenious acid ; 

 the numbers thus obtained are not comparable with those 

 tabulated in former series. 



Phosphorous Acid, H 3 P0 3 . 



p. 



v. 



m v 



m 2 . 



m. 



log tan m. 



Diff. 



1 



2 



28-63 



28-62 



28-63 



97371 



0-0966 

 01076 

 0-1209 

 01246 

 0-1351 

 01220 

 0-1143 

 00986 

 0-0598 



2 



4 



34-30 



34-28 



34-29 



9 9337 



3 



8 



41-17 



41-11 



4114 



99413 



4 



16 



49-17 



49-00 



49-09 



0-0622 



5 



32 



56-96 



56-96 



56 96 



0-1868 



6 



64 



64-65 



64-39 



64-52 



0-3219 



7 



128 



70-28 



70-14 



70-21 



0-4439 



8 



256 



74-69 



74-39 



74-54 



0-5582 



9 



512 



77-84 



77-30 



77-57 



0-6568 



10 



1024 



79-30 



78-92 



79-11 



0-7158 



11 



2048 



80-00 



79 50 



79-75 







12 



4096 



79-60 



78-54 



79-07 







The differences are very small when the dilutions are large ; 

 this is probably due to formation of some phosphoric acid the 

 molecular conductivity of which is smaller than that of phos- 

 phorous acid. In other respects the course of the change of 

 conductivity of phosphorous acid is similar to that of the 

 monobasic acids. 



Those dibasic acids whose normal salts are not alkaline but 

 neutral behave very differently. Even the weaker acids of 

 this class show an increase of conductivity over the monobasic 

 acids when the solutions become dilute ; this advance of con- 

 ductivity is exhibited sooner and to a greater extent the 



