HATE OP BABYTA IN ACID SOLUTIONS. 



97 



ON THE INFLUENCE OF MASS ON CHEMICAL AFFINITY. 



When the results contained in the preceding tables are 

 compared, there is observed a certain number of facts which 

 demonstrate the influence of masses of matter " put in pre- 

 sence f and in order to corroborate this assertion, I add here 

 a certain number of results, extracted from the preceding 

 tables. 



1. If we compare the results given by the two first jars in 

 Tables Nos. 1, 2, and 4, it will be seen that, although the 

 same quantity of acid was employed, the time necessary for 

 the formation of a precipitate varied considerably. 



The differences observed above can only be owing to the fact 

 that, for the same quantity of fluid, increasing proportions 

 of nitrate of baryta and sulphate of potash were employed ; 

 for it cannot be explained by admitting that it is owing to 

 there not being a sufficient quantity of nitric acid to hold a 

 greater quantity of sulphate of barytes in solution ; for if we 

 calculate how much sulphate of baryta remains dissolved in 

 1000 grs. of acid, it will be seen that the quantities are the 

 same in each of the three tables. 



