270 Prof. Graham on the Diffusion of Liquids, 



Table XI. — Diffusion of Chloride of Potassium and Chloride 

 of Ammonium. 



Parts of anhydrous salt to 100 

 water. 



Density of so- 

 lution at 60°. 



At 66°-2. 



At 64°- 7 



Experi- 





Experi- 



Mean. 







ments. 





ments. 





Chloride of potassium. 













2 



10127 



7-83 





8-03 









772 





7-89 



7-96 







755 



770 







4 



10248 



15-22 





15-21 









15-59 





14-82 



1501 







1507 



15-29 







H 



10401 



24-88 





24-83 









24-64 





24-62 



24-72 







25 09 



24-87 







10 



1-0592 



36-23 

 37-63 



36-93 







Chloride of ammonium. 













2 



1-0061 



710 





710 









8-52 



7-81 



7-24 



717 



4 



1-0118 



14-55 





13-91 









14-64 



14-60 



14-91 



14-41 



fi2 

 °3 



1-0190 



24-30 



24-30 



2412 

 24 13 



2412 



10 



10272 



36-53 



36-53 







These two salts agree well in diffusibility, and are also evi- 

 dently related to the preceding nitrates. The quantity of 

 chloride of ammonium diffused was determined by evapora- 

 tion, which is troublesome and may lead to small errors, from 

 the volatility and efflorescent tendency of this salt. It would 

 be easier and more accurate to determine this and other chlo- 

 rides by the use of a normal solution of nitrate of silver, and 

 so avoid evaporation. 



Diffusion at 66°'2. 



2. 



4. 



6£. 



10. 



Chloride of potassium 7*70 

 Chloride of ammonium 7*81 



15-29 

 14-60 



24-87 

 24-30 



36-93 

 36-53 



The quantities diffused of these two chlorides are more 

 closely in proportion to the strength of the original solution, 

 than with any of the preceding salts of potash. Thus the 

 quantities diffused from the 2 and 10 per cent, solutions of 

 chloride of potassium are 7*70 and 36*93 grs., which are as 2 

 to 9*6, which is nearly as 2 to 10. Chloride of sodium was 

 observed before to be nearly uniform in this respect; but other 

 salts appear to lose considerably in diffusibility with the higher 



