CONCENTRATED AQUEOUS SOLUTIONS, AND HYDRATION OF THE SOLUTE. 881 



of constancy of hydration values an indication is scarcely given as to whether for the 

 above salts the hydration is only ionic or both molecular and ionic. None of the salts 

 above mentioned give a high percentage hydration. 



For lithium chloride, bromide, and iodide, strontium bromide, and calcium bromide, on 



























mm Mlmttnm 1 Wlff 





5 



























y 











































§ 







Iptljp^j: 















tKI fFltlff 











a; 





IJhMJbIS™ 













55 

 si <c 



3 





















HIM 









5 

















1 

 h 



















































. 









lll[lll 









1 1 1 m II III 1 1 ll 1 1 1 1 1 1 1 1 lllll II 1 1 1 1 11 

































in nil nnnimiiinimiinir 





30 40 SO 60 



PERCENTAGE HYDRATION 



Fig. 11. 



the supposition that both molecules and ions hydrate, there is a good degree of constancy 

 in hydration values # up to a concentration of from 5 to 8 gramme equivalents per litre. 

 The constancy of the number of molecules of hydration in these several instances is 

 scarcely less than striking if the number of experiments and curve readings which enter 



* Tables, pages 872 and 874. 



