12$ 



On the Laws of Chemical Change. 

 Table III. 



Temp. 





b. 



Means. 



Am oi 



ant of 



Eatio of 

 H 01 to 

 H 2 S0 4 . 



Calculated ratio 

 of dynamical 



C. 





a. 



b. 



H 3 S0 4 . 



HC1. 



equivalence of 

 H01toH 2 SO 4 . 













grms. 



grms. 







10°-9 



230-7 

 232 

 163-6 

 163-7 



2349 

 2366 

 1664-7 

 1664-9 



231-3 

 163.6 



2357-5 

 1664-8 



6 



4 



X 



X 

 2 

 n 



1 2:2 



36-5 : 82-1 



12°-6 J 



148 

 147-9 

 104-4 

 102-2 



1487-7 

 1493-9 

 1023 

 10108 



148 

 103-3 



1490-8 

 1016-9 



8 



5 



X 

 X 

 3 



>> 



I 3:3 



36-5:81-8 



ll°-5 j 



218-8 

 219 

 201 

 203-2 



2216-7 

 2233-7 



2067-6 

 2066-4 



218-9 

 2021 



2225 

 2067 



6 

 4 



X 



X 

 1-108 



1 1-108 : 2 



36-5 : 80-9 



15° J 



1196 

 120-4 

 118-7 

 120-2 



1195-5 

 1203-3 

 1194-5 



1207-8 



120 

 119-4 



1199-4 

 1201-2 



8 

 4 



X 

 X 



1-825 



365:80 



X 



13°-9 



168-6 

 167-7 

 1671 



168-9 



1719-6 

 1709-3 

 1707-2 

 1710-3 



168-1 



168 



1714-4 



17087 



6 



4 



X 

 •913 



I 36-5:80 



X 



13° 2 



93-9 

 93-7 

 931 

 92 



927-4 

 927-8 

 930 

 923 



93-8 

 925 



927-6 

 926-5 



12 



4 



X 



X 



3-65 



I 36-5:80 



X 



* 14°-4 



124-5 

 123-7 

 150-7 

 152-5 



1116-3 

 1108-9 

 1374-4 

 1395-2 



124-1 

 151-6 



1112-6 



1384-8 



9-8 

 >) 

 X 

 X 



X 



X 



3-65 



>5 



36-5:98 



36-5 : 787 



* These four experiments were made with different solutions from the others. 



Taking into consideration the results contained in Tables I. 

 and II. it is evident that the calculated dynamical ratio of 



hydric chloride to sulphate cannot be correct, since - is not 



exactly proportional to the amount of acid. To find the true 

 value a series of experiments were made with the hydric chlo- 

 ride to sulphate ranging from 36*5 : 75 to 36*5 : 85 ; and the 

 numbers found to give the same rate of oxidation were 36*5 

 parts by weight of hydric chloride in place of 80 parts hydric 

 sulphate (experiments nos. 4 7 5, 6, Table III.). It is curious 

 to note that this is the same as the ratio of the molecular 

 weight of hydric chloride (36*5) to that of sulphur trioxide 



(80). 



Several attempts have been made to obtain the ratio of 

 dynamical equivalence of these two acids. Harcourt and 

 Esson ; with reference to their experiments on the decompo- 



