858 DR S. M. JOHNSTON ON THE BOILING AND FREEZING POINTS OF 



Barium Bromide 





Magnesium 



Sulphate. 



Zinc Sulphate. 



Grm. eqs. per 

 Litre. 



Elev. per Grm. 

 eq. 



Grm. eqs. per 

 Litre. 



Elev. per Grm. 

 eq. 



Grm. eqs. per 

 Litre. 



Elev. per Grm. 

 eq. 



■421 





750 



155 



•24 



•145 



•32 



•620 





753 



•395 



•20 



•515 



■17 



•950 





77 



•715 



•17 



•835 



•16 



1-626 





81 



•975 



•19 



1025 



•16 



2-346 





85 



1-320 



•21 



1-330 



•15 



2-962 





88 



1-652 



•21 



1-581 



15 



3-532 



1 



08 



1-934 



•21 



1-855 



•16 



4090 



1 

 1 



15 

 19 



2-210 

 2-552 



•20 

 •21 







5-468 





6-730 



1 

 1 



20 



24 









8-076 









8-922 



1 



25 









10-041 



1-16 









Lithium '. 



Bromide. 



Barium Chloride. 





Grm. eqs. per 

 Litre. 



Elev. per Grm. 

 eq. 





•262 



1-04 



Gesium Nitrate. 



•584 



•91 

 1-03 

 1-80 



2-08 

 2-17 









1051 

 5-168 



6-178 



Grm. eqs. per 

 Litre. 



Elev. per Grm. 

 eq. 



Grm. eqs. per 

 Litre. 



Elev. per Grm. 

 eq. 



6-514 











6-786 



2-29 



•198 



•99 



•312 



•99 



7 048 



2-37 



•485 



•64 



•758 



•89 



7-176 



2-46 



1-045 



•70 



1-175 



•86 



7-298 



2-61 



1-885 



•69 



1 418 



•92 



7-98 



3 00 



2-865 



•71 



1725 



•92 



8-664 



3-16 



3-520 



•81 



1-965 



•94 



10-00 



3-33 



3-855 



•87 



2-202 



•98 



10-56 



3-49 



4-743 



•84 



2-378 



1-02 



11-72 



3-57 



5-230 



■86 



2-502 



1-05 



12-28 



3-70 



5-812 



•78 



2-680 



1-07 



In fig. 2 gramme equivalents per litre have been plotted against equivalent 

 elevation of the boiling point, and molecular depression of the freezing point, and 

 the curves drawn in. The freezing-point # curves show that for nitric and hydrochloric 

 acid a maximum point occurs in the curve, and the boiling-point curve for hydro- 

 chloric acid also shows a maximum point. 



If the curves for which equivalent elevation has been plotted against concentration 

 for calcium bromide and sulphuric acid be compared, it will be seen that they are almost 

 superimposed, which shows that a salt and an acid may be very much alike in their 

 elevation per gramme equivalent over a wide range of concentration. 



* Tables, page 877. 



