204 



REV. S. M. JOHNSTON 





Ammonium 



Chloridu. 





Grm. eqs. 



Elevation of 



Ionization 



Elevation 



per Litre. 



Boiling Point. 



Co-eff. 



Constant. 



141 



•128 



•844 



520 



•412 



■363 



•704 



522 



•793 



■573 



•653 



518 



•825 



•760 



•650 



520 



1-055 



•892 



■630 



523 



1-255 



1-076 



■620 



519 



1-531 



1-329 



•606 



523 





Ammonium 



Sulphate. 





Grm. eqs. 



Elevation of 



Ionization 



Elevation 



per Litre. 



Boiling Point. 



Co-eff. 



Constant. 



•04S 



■039 



•672 



522 



■092 



•071 



•614 



520 



•168 



103 



•562 



523 



•236 



•138 



•536 



521 



•294 



•163 



•520 



523 



•374 



•191 



•496 



518 



•436 



•236 



■483 



521 



•518 



•275 



•458 



524 



•612 



•321 



•442 



521 





Cadmium 



Iodide. 





Grm. eqs. 



Elevation of 



Ionization 



Elevation 



per Litre. 



Boiling Point 



Co-eff. 



Constant. 



•415 



•169 



•167 



520 



•639 



•218 



•146 



516 



1-048 



•286 



•119 



519 



1-210 



•354 



•115 



521 



1-308 



•436 



■113 



519 



Potassium Nitrate. 



Cadmium Chloride. 



Caesium Nitrate. 



Grm. eqs. 



Elevation of 



Ionization 



Elevation 



per Litre. 



Boiling Point. 



Co-eff. 



Constant. 



041 



'063 



•665 



519 



■089 



■112 



■657 



511 



•139 



•160 



•642 



514 



•187 



•206 



•629 



521 



•244 



•252 



•616 



518 



•301 



•292 



•611 



516 



•364 



•348 



•608 



516 



•431 



•403 



•605 



516 



Grms. eqs. 

 per Litre. 



Elevation of 

 Boiling Point. 



Ionization 

 Co-eff. 



i 



Elevation 

 Constant. 



•330 



1-512 



•129 

 •484 



■251 

 •132 



517 

 520 



Grms. eqs. 



Elevation of 



Ionization 



Elevation 



per Litre. 



Boiling Point. 



Co-eff. 



Constant. 



•312 



■310 



•706 



514 



•758 



•675 



•618 



520 



1-175 



1-010 



•580 



525 



1-418 



1-310 



•550 



519 



i 



(2) Molecular Weight Calculations. 



Owing to the fact that boiling-point elevation determinations have been affected by 

 the large error pointed out in the determination of the boiling point of water, it has 

 not been possible with water as solvent to make other than rough determinations of 

 molecular weights, and the error in the determination of the boiling point of water 

 being variable from experiment to experiment, the determinations made by different 

 experimenters have varied by as much as 20 per cent.* The error involved would 

 frequently have been greater had not one error helped to counterbalance another. 

 That is, the assumption of total ionization, when the latter was only from 70 to 80 



m. Oes., 31, 471 (1898); Practical Methods for determining Molecular Weights, Biltz, translated 

 by JONES and KING, ]>. 1H9 (1809) ; Zeit. fiir Anorg. Ghemie, 17, pp. 435 and 450 (1898) ; Sakurai, Journal of Chm. 

 Walker and Lumsden, Journal of Ohem. Soc, 73, 509 (1898). 



