36 



WORK OF C. M. STTNE. 

 Table 23 Continued. 



Hydrates. 



m 



Lr 



M 



0.3 Mg(N0 3 ) 2 

 0.3 Sr(NO,) 3 . 

 0.5 Mg(N0 3 ) 2 

 0.5Sr(NO 3 ) 2 . 

 0.7 Mg(N0 3 )2 

 0.7 Sr(NOs)a. 

 0.9 Mg(N0 3 ) 2 

 0.9 Sr(N0 3 ) 2 . 

 1.1 Mg(NOi) 2 

 1.1 Sr(N0 3 ) 2 . 

 1.3 Mg(N0 3 ) 2 

 1.3 Sr(NOj)j. 

 l.SMg(NO,), 

 1.5Sr(N0 3 ) 2 . 



Sp. gr. 

 cor. 



M c 



4.9 

 1.0 

 6.5 

 2.4 

 8.8 

 3.4 



11.4 

 4.4 



13.3 

 4.9 



15.2 

 5.5 



17.0 

 5.7 



H e 



32.5 



6.6 

 26.0 



9.6 

 25.1 



9.6 

 25.3 



9.8 

 24.2 



8.8 

 23.4 



8.5 

 22.7 



7.6 



The values of M for this mixture are calculated by the method already given. 

 Evidently the same method of calculation applies here as in the case of a mixture of 

 calcium chloride and strontium chloride. 



The values of M , in single solution and in the mixture, for magnesium nitrate and 

 strontium nitrate have been plotted as curves in fig. 7. The phenomena are, in gen- 



15 



"8 



c 

 2 

 E 



a 







8 







s 



e 



e4 

 E 



o 



Z 5 



jS 





 Z 



3 



2 



Fig. 7. 



I. Magnesium Nitrate Alone. 



II. Magnesium Nitrate Mixed with Strontium 

 Nitrate. 



III. Strontium Nitrate Alone. 



IV. Strontium Nitrate Mixed with Magnesium 



Nitrate. 



.5 .75 



Gram Molecules of Salt per Liter of Solution 



eral, the same as those already pointed out in preceding cases. Curve IV deviates 

 from curve III with increasing concentration, showing the effect of the large increase 

 in the value of M for magnesium nitrate, with increasing concentration, upon the 

 amount of water eliminated as water of hydration by the strontium nitrate. The 

 strontium nitrate is dehydrated, partially, by the magnesium nitrate. 



