and Attached Water. 



363 



of-wine tracing passes through its cryohydrate. In the centre 

 column of Table XX. is given the greatest cold when used 

 as cryogens that these acids can produce. The acid was in all 

 cases at 12° C. The great specific heat of the water in which 

 the HC1 is dissolved prevents, of course, the attainment of the 

 degree of cold equal to that necessary to solidify a cryohydrate, 

 as is the case with those true salts which do not heat on hy- 

 dration. 



§ 132. Separation of Ice or Anhydrous Bromide of Potas- 

 sium from solutions of that salt. 





Table XXI. 



. 



KBr 



per cent, by 

 weight. 



H 2 



per cent, by 

 weight. 



Temperature 

 Centigrade at 

 which solidifi- 

 cation begins. 



Nature of solid 

 formed. 



10 



20 



30 



3215 



33 

 •34 



35 03 

 (Kr.) 397 

 (Kr.) 43-2 



90 



80 



70 



67-9 



67 



66 



65 



603 



56-8 



o 



- 3 



- 71 

 -120 

 -13 



- 9-8 



- 50 

 



+20 

 +40 



Ice. 



Cryohydrate. 

 KBr. 



The solubility at 0° was found from an experiment in which 

 11*2939 grms. of solution gave 3*9566 grms. of KBr. As 

 Kremers found 34*5, 1 have adapted his determinations at + 20° 

 and + 40° by adding 0*5 to the numbers he gives. 



§ 133. Separation of Ice and Anhydrous Iodide of Potas- 

 sium from solutions of that salt. 





Table XXII. 





KI 



per cent, by 

 weight. 



H 2 



per cent, by 

 weight. 



Temperature 

 Centigrade at 

 which solidifi- 

 cation begins. 



Nature of 

 solid formed. 



10 



90 



O 



- 2 2 



Ice. 



20 



80 



- 51 





30 



70 



- 9-0 





40 



60 



-14-4 





5207 



47*93 



-22 



Cryohydrate. 



55-93 



4407 







KI. 



(Kr.) 58-9 



411 



+20 



M 



(Kr.) 61-4 



38-6 



+40 



» 



Having found that 10*3681 grms. of the solution saturated 



