Solubility of Salts in Water. 



377 



The solubility of each of these salts in water at 20° C. was 

 first determined, with the results given in Table I. 



Table L 

 Solubility of Single Salts at 20° C. 



Salt, 



I. 



II. 



Mean. 



Molecules. ' 



NaCl 



35-92 

 34-49 



87-64 

 31-11 



35-89 

 34-55 

 87-66 

 31-11 



35-905 

 34-52 



87-65 

 31-11 



11-048 

 8-329 



18-562 

 5-539 



KC1 



NaN0 3 



KN0 3 





In parts per 100 of water and molecules per 100 H 2 0. 



In Table II. these results are compared with those given by 

 other experimenters, and the mean of all my previous expe- 

 riments published and unpublished. 



Table II. 





Nad. 



KC1. 



NaN0 3 . 



KX0 3 . 



Present mean ... 

 Former ,, 

 Mulder 



35-905 

 35-69 

 36 00 

 3610 



34-52 

 34-72 

 34-70 

 34-68 



87-65 



87 61 



87-50 



88 



88-70 



89-55 



3111 

 30-72 

 31-20 



31-96 



Gay-Lussac 



KoDD 



Poggiale 



3601 





In view of the close concordance of my present determina- 

 tions and the long time allowed for saturation, along with the 

 fairly close agreement with those of Mulder and Gay-Lussac, 

 I feel justified in adopting my present mean as the true state- 

 ment of the solubility of these four salts. 



The solubility of the salts in pairs was then determined, 

 with the precaution of adding excess of salt A to one and 

 excess of salt B to the other of the duplicate experiments. 

 The results are given in Table III., along with those previously 

 obtained by me and those of Rudorff. 



