J. L. Kreider — Behavior of Typical Hydrous Bromides. 103 



the solution thus formed allowed to crystallize by evaporation 

 in vacuum over sulphuric acid : the crystals thus formed were 

 of nearly normal constitution. 



Found. Theory. 



Al _.. 07*25^ 07-20^ 



Br 3 _.. 63.90 63'95 



6HO 28-85 28-85 



100-00 



100-00 



The course of dehydration of hydrous aluminum bromide in 

 air and in an atmosphere of hydrogen bromide is shown in the 

 accompanying table and diagram. 



Dehydration of Aluminum Bromide. 

 AlBr 3 -6H 2 0. 



Atmos- 

 phere. 



Weight 

 taken. 



grm. 



o J 



, ( HBr 

 X \ Air 

 HBr 

 Air 

 j HBr 

 i Air 

 \ HBr 

 ( Air 

 { HBr 

 ( Air 

 ( HBr' 

 j Air 

 HBr 

 Air | 

 ( HBr 

 ( Air i 

 ( HBri 

 ) Air ! 



7 



10 



11 



i2-; 

 is-f 



14 



15 



HBrl 

 Air 

 HBr 

 Air 

 HBr 

 Air I 

 HBr 

 Air I 

 j HBr 



j HBr| 



\ Air I 



1308 

 1306 

 1394 

 1381 

 1344 

 1360 

 1317 

 1316 

 1364 

 1378 

 1381 

 1367 

 1297 

 1318 

 1379 

 1357 

 1366 

 1355 

 1308 

 1348 

 1380 

 1390 

 1378 

 1346 

 1331 

 1307 

 1362 

 1377 

 1355 

 1345 



Loss on 

 heating. 



grm. 



0000 

 0000 

 0000 

 0000 

 0000 

 0000 

 0008 

 0014 

 0008 

 0024 

 0008 

 0054 

 0006 

 0106 

 0011 

 0127 

 0113 

 0549 

 0121 

 0668 

 0270 

 0919 

 0561 

 0949 

 0850 

 0976 

 0938 

 1090 

 0958 

 1040 



per 

 cent. 



oo-oo 



00-00 



oo-oo 



00-00 

 00-00 

 00-00 

 00-60 

 01-06 

 00-58 

 01-74 

 00-57 

 03-95 

 00-46 

 0804 

 00-79 

 09-35 

 08-27 

 40-51 

 09-25 

 49-55 

 19-56 

 66-11 

 40-71 

 70-50 

 63-86 

 74-67 

 68-87 

 79-15 

 70-70 

 77*32 



Bromine in 

 residue. 



grm. 



per 



cent. 



'0831 

 '0842 

 •0861 

 •0865 

 •0878 

 •0834 

 •0825 

 •0767 

 •0831 

 •0771 

 •0730 

 ■0485 

 •0740 

 •0413 

 •0703 

 •0281 

 •0477 

 •0232 

 •0280 

 •0193 

 ,0232 

 •0197 

 ■0246 

 •0158 



63-13 

 64-05 

 63-60 

 62-83 

 63-62 

 61-07 

 63-64 

 58-24 

 60-32 

 56-85 

 53-46 

 35-84 

 56-57 

 30-66 

 50-94 

 20-72 

 34-65 

 17-28 

 21*09 

 14-80 

 17-08 

 14-33 

 18-04 

 11-76 



HBr 



lost. 



per 

 cent. 



00-83 

 00-10 

 00-35 

 01-13 

 00-33 

 02-91 

 00-31 

 05-78 

 03-67 

 07-18 

 10-62 

 28-46 

 07-43- 

 33-71 

 13-17 

 43-77 

 29-67 

 47-26 

 43-40 

 49-72 

 47-46 

 50-24 

 46-49 

 52-85 



Water 

 lost. 



per 



cent. 



00-23 

 01-16 

 00-23 

 00-61 

 00-24 

 01-04 

 00-15 

 02-26 

 02-89 

 02-17 

 02-35 

 12-05 

 01-82 

 15-84 

 06-39 

 22-34 

 11-04 

 23-24 

 20-46 

 24-95 

 21-41 

 28-91 

 24-21 

 24-47 



Time. 



hrs. 



Temper- 

 ature. 



70° C. 



80° 



90° 

 100° 

 110° 

 120° 

 130° 

 140° 

 150° 

 160° 

 170° 

 180° 

 190° 

 200° 

 210° 



