ON THE BOILING POINTS OF AQUEOUS SOLUTIONS OF ELECTROLYTES. 205 



or 90 per cent., not unfrequently diminished the error resulting from an inaccurate 

 determination of the boiling point of water. 



For all the salts the boiling-point data given in the following tables are my own, 

 but for KC1, KBr, NaN0 3 , KN0 3 , and NaCl the ionization coefficients are from 

 conductivity values given by Krannhals. For these I considered it sufficient to 

 calculate the ionization coefficients to two places of decimals, as Krannhals only 

 claims an accuracy of from 2 to 3 per cent, error limit. 



For the remainder of the salts considered the ionization coefficients have been obtained 

 from conductivity data determined by myself, which are given in Part III. of this paper. 

 For these I have usually calculated the ionization coefficients to three places of decimals. 



The following tables contain molecular weight computations which have been made 

 bv the use of the formula 



,_ C(1 4-ra- l q)At 

 WAE~ 



Sodium Chloride. 



Grms. Salt 

 added to 

 50 c.c. 

 Solvent. 



Per cent. 

 Composi- 

 tion. 



Grm. 



eqs. per 



Litre. 



Elevation 



of Boiling 



Point. 



Ionization 

 Co-eft'. 



Molecu- 

 lar 

 Weight. 



59-8 



•2070 



•48 



•080 



•096 



•79 



•4294 



•91 



T62 



•169 



•76 



58-0 



■6143 



1-23 



•218 



•228 



•70 



57-5 



■8314 



1-66 



•294 



•294 



•68 



57-4 



10277 



2-01 



•356 



•356 



•67 



57-3 



1-2160 



2-38 



•404 



•421 



•66 



57-4 



1-5870 



2-98 



•528 



•541 



•65 



57-7 



2 0284 



3-88 



•634 



■680 



•65 



58-4 



25044 



4-80 



•856 



•826 



•64 



57-9 



2-9744 



5-67 



1-004 



•986 



•64 



57-7 



34182 



6-47 



1-148 



1T44 



•63 



576 



Mean molecular weight found. 57-9. 

 * International value, . 58*9. 



Ammonium Sulphate. 



Gnus, Salt 



added to 



50 c.c. 



Solvent. 



•1750 



Per cent. 

 Composi- 

 tion. 



■352 



Grm. 



eqs. per 



Litre. 



Elevation 



of Boiling 



Point. 



Ionization 

 Co-elf. 



•670 



Molecu- 

 lar 

 Weight. 



048 



039 



1354 



•3140 



•630 



092 



•075 



•610 



133-2 



•7306 



1-553 



■236 



T50 



•536 



131-7 



•9590 



1902 



•294 



■177 



•518 



132-6 



1-2245 



2-417 



•374 



■215 



•496 



132 5 



1-4358 



2-82 



•436 



•250 



•478 



132-0 



1-7120 



3-34 



•518 



•299 



•456 



130-1 



2-0126 



3-91 



•612 



•345 



•438 



131-8 



Mean molecular weight found, 132 - 4. 

 International value, . 132-20. 



Sodium Nitkate. 



Grms. Salt 



added to 



50 c.c. 



Solvent. 



Per cent. G 

 Composi- eq 



rm. 

 s. per 



Elevation 

 of Boiling 



Ionization 

 Co -elf 



Molecu- 

 lar 



tion. I 



itre. 



Point. 





Weight 

 86 



•2054 



•36 



042 



•053 



•87 



•4860 



•87 



105 



•111 



•82 



87 



1-0198 



1-81 



218 



•220 



•76 



87 



1-4880 



2-50 



302 



•312 



•70 



86 



1-9852 



3-60 



435 



•420 



•65 



85 



2-5216 



4-80 



578 



•530 



•62 



82 



3-0242 



5-54 



667 



•632 



•59 



80 



3-5682 



6-58 



744 



■700 



•54 



83 



Mean molecular weight found, 84*4. 

 International value, . . 85 09. 



Potassium Bromide. 



Grm. Salt 

 added to 

 50 c.c. 

 Solvent. 



Per cent. 

 Composi- 

 tion. 



Grm. 



eqs. pel- 

 Litre. 



Elevation 



of Boiling 



Point. 



Ionization 

 Co-eft'. 



Molecu- 

 lar 

 Weight. 



•4250 



•85 



■088 



•112 



■796 



121 



•6854 



136 



T40 



T61 



•774 



123 



•8813 



1-75 



T70 



•198 



•758 



120 



1-0293 



2-03 



•208 



•223 



•744 



118 



1-2945 



2-55 



•260 



•252 



■732 



118 



1-5705 



3-07 



■312 



•312 



•720 



116 



1-9564 1 



3-88 



•396 



•374 



•706 



115 



2-3074 



1 



4-45 



•456 



•435 



•692 



114 



Mean molecular weight found, 118T. 

 International value, . . 119T1. 



International atomic weights, 1904. 



