100 J. L. Kreider — Behavior of Typical Hydrous Bromides. 



Dehydration of Hydrous Magnesium Bromide. 

 MgBiv 6H 2 0. 



Atmos- 



Weight 

 taken. 



Loss on 

 heating. 



Bromine in 

 residue. 



HBr 



lost. 



Water 

 lost. 



Time. 



Temper- 



phere. 



grm. 



grm. 



per 

 cent. 



grm. 



per 

 cent. 



per 

 cent. 



per 



cent. 



hrs. 



ature. 



(HBr 



1 | Air 



•2389 



•oooo 



oo-oo 



•1310 



54-81 



00-12 



00-12 



l 



70° C. 



•2400 



•oooo 



oo-oo 



•1319 



54-98 



00-29 



00-29 



2" 



9 i HBr 



•1370 



•oooo 



00-00 



•0751 



54*85 



00-16 



00-16 



1 



80° 



2 \ Air 



•1380 



•0012 



00-86 



•0752 



54-55 



00-14 



00-72 



2 



« i HBr 

 d ( Air 



•1259 



•0019 



01-50 



•0693 



54-96 



00-27 



01-77 



1 



90° 



•1482 



•0023 



01'95 



•0813 



54-87 



00-18 



02-13 



4 f HBr 



4 ) Air 



•1220 

 •3448 



•0053 

 •0048 



04-34 

 03-31 



•0664 

 •0797 



54-46 



55-07 



00-23 

 00-38 



04-11 

 03-69 



1 

 2 



100° 



•{8? 



•1345 



•0070 



05-20 



■0736 



54*76 



00-07 



05-27 



i 



110° 



•1384 



•0103 



07*44 



•0752 



54-33 



00-36 



07-80 



•is? 



•1374 



•0115 



08-36 



•0751 



54-69 



oo-oo 



08-36 



1 



120° 



•1353 



•0120 



08-86 



•0737 



54-50 



00-19 



08-67 



2 



(HBr 



7 (Air 



•1331 



•0114 



08-56 



•0724 



54-41 



00-28 



08-28 



i 



130° 



•1317 



•0128 



09-71 



•0714 



54-28 



00-41 



09-30 



MS' 



•1345 



•0140 



10-40 



•0734 



54-58 



00-11 



10-29 



1 



140° 



•1369 



•0183 



13-37 



•0733 



53-59 



01-11 



12-26 



2 



•{£- 



•1375 

 •1358 



•0216 

 •0251 



15-71 



18-48 



•0748 

 •0727 



54-47 

 53-58 



00-22 

 01-12 



15-49 

 17-36 



* 



150° 



Hs* 



•1313 



•0140 



10-66 



•0714 



54-46 



00-23 



10-46 



1 



160° 



•1311 



•0324 



24-71 



•0698 



53-26 



01-44 



23-27 



2" 



11 i HBr 



( Air 



•1366 



•0170 



12-44 



•0744 



54-39 



00-31 



12-13 



* 



170° 



•1379 



•0159 



11-53 



•0744 



54-00 



00-69 



10-84 



12 i HBr 



" j Air 



•1399 

 •1358 



•0220 

 •0232 



15-72 

 17-08 



•0760 

 •0723 



54-35 

 53-27 



00-34 

 01-43 



15-38 

 15-65 



1 

 2 



180° 



( Air 



•1285 

 •1324 



•0217 

 •0275 



16-89 

 20-77 



•0696 

 •0702 



54-75 

 53-06 



00-06 

 01-65 



16-95 

 19-12 



JL 



190° 



14 j ^Br 



( Air 



•1345 



•0284 



21-11 



•0731 



54-42 



00-27 



20-84 



1 



200° 



•1382 



•0312 



22-57 



•0730 



52-87 



01-84 



20-73 



2 



/ Air 



•1349 



•0282 



20-90 



•0731 



54-19 



00-50 



20-40 



i 



210° 



•1350 



•0331 



24-51 



•0704 



52-20 



02-51 



22-00 



16 1 Air 



•1337 

 •1320 



•0297 

 •0379 



22-21 



28-71 



•0722 

 •0686 



54-01 

 52-03 



00-68 

 02-69 



21-53 

 26-02 



i 



220° 



17 jHBr 

 11 \ Air 



•1354 

 •1373 



•0340 

 •0606 



25-11 

 44*13 



•0731 

 •0649 



54-02 

 47-43 



00-67 

 07-35 



24-47 

 36-78 



J 



230° 



18 | ?Br 



( -^ ir 



•1376 



•0401 



29-14 



•0740 



53-69 



01-01 



28-13 



1 



240° 



•1360 



•0555 



40-80| -0665 



48-93 



05-80 



35-00 



2 





From these results it appears that approximately a third of 

 the water may be removed from the hydrous magnesium bro- 

 mide, submitted at once to the temperatures indicated, either in 

 air or in an atmosphere of hydrogen bromide, without consid- 

 erable simultaneous loss of hydrogen bromide from the salt, 

 the trifling loss being somewhat less in the atmosphere of 



