﻿Kuzirian 
  — 
  Water 
  of 
  Crystallization 
  in 
  Sulphates. 
  405 
  

  

  

  

  Table 
  I. 
  

  

  

  Determination 
  of 
  watei 
  

  

  * 
  of 
  crystallization 
  in 
  various 
  

  

  sulphates. 
  

  

  

  

  Loss 
  of 
  the 
  Gain 
  of 
  

  

  

  

  Dried 
  

   sodium 
  

  

  porcelain 
  sulphuric 
  

   boat 
  acid 
  

  

  

  Sulphate 
  

   taken 
  

  

  tungstate 
  

   taken 
  

  

  after 
  weighing 
  

   ignition 
  tube 
  

  

  Difference. 
  

  

  grm. 
  

  

  grm. 
  

  

  grm. 
  grm. 
  

  

  

  CuS0 
  4 
  .5H 
  2 
  0. 
  

  

  

  Copper 
  Sulphate. 
  

  

  

  0-2000 
  

  

  4 
  

  

  0-0707 
  0-0701 
  

  

  — 
  0-0006 
  

  

  0-2000 
  

  

  4 
  

  

  0-0715 
  0-0712 
  

  

  — 
  0-0003 
  

  

  A1 
  2 
  (S0 
  4 
  ) 
  3 
  .18H 
  2 
  

  

  Aluminum 
  

  

  Sulphate 
  (Al 
  2 
  (S0 
  4 
  ).l8H 
  a 
  O. 
  

  

  

  0-2000 
  

  

  4 
  

  

  0-0897 
  0-0913 
  

  

  + 
  0-0016 
  

  

  0-2000 
  

  

  4 
  

  

  0-0900 
  0-0894 
  

  

  — 
  0-0006 
  

  

  0-2000 
  

  

  4 
  

  

  0-0907 
  0-0915 
  

  

  + 
  0-0008 
  

  

  0-2000 
  

  

  4 
  

  

  0-0925 
  0-0935 
  

  

  + 
  0-0010 
  

  

  NiS0 
  4 
  .6H 
  2 
  0. 
  

  

  Nickel 
  Sulphate 
  (NiS0 
  4 
  .6H 
  2 
  0). 
  

  

  

  0-2000 
  

  

  3 
  

  

  0-0822 
  0-0831 
  

  

  + 
  0*0009 
  

  

  0-2000 
  

  

  3 
  

  

  0-0832 
  0-0833 
  

  

  + 
  0-0001 
  

  

  0-2000 
  

  

  3 
  

  

  0-0826 
  0-0825 
  

  

  + 
  0-0001 
  

  

  

  Chrome 
  Alum 
  (K 
  2 
  S0 
  4 
  .Cr 
  2 
  (S0 
  4 
  ) 
  3 
  ).24H 
  2 
  0. 
  

  

  

  K 
  2 
  S0 
  4 
  Cr 
  2 
  (S0 
  4 
  ) 
  3 
  .! 
  

  

  MH 
  2 
  0. 
  

  

  

  

  0-2000 
  

  

  4 
  

  

  0-0807 
  0-0800 
  

  

  — 
  0-0007 
  

  

  0-2000 
  

  

  4 
  

  

  0-0755 
  0-0755 
  

  

  o-oooo 
  

  

  0-2000 
  

  

  4 
  

  

  0-0780 
  0-0794 
  

  

  + 
  0-0014 
  

  

  

  Potassium 
  Alum 
  (K 
  2 
  S0 
  4 
  . 
  A1 
  2 
  (S0 
  4 
  ) 
  3 
  ).24H 
  2 
  

  

  

  0-2000 
  

  

  3 
  

  

  0-0915 
  0-0923 
  

  

  + 
  0-0008 
  

  

  (V2000 
  

  

  2 
  

  

  0-0911 
  0-0929 
  

  

  + 
  0-0018 
  

  

  0-2000 
  

  

  3 
  

  

  0-0910 
  0-0915 
  

  

  + 
  0-0015 
  

  

  0-2000 
  

  

  3 
  

  

  0-0915 
  0-0928 
  

  

  + 
  0-0013 
  

  

  From 
  the 
  results 
  detailed 
  in 
  the 
  above 
  table, 
  it 
  is 
  evident 
  

   that 
  there 
  is 
  no 
  loss 
  other 
  than 
  water 
  during 
  the 
  fusion. 
  Even 
  

   from 
  aluminum 
  and 
  chromium 
  sulphates 
  which 
  lose 
  their 
  acidic 
  

   oxide 
  on 
  simple 
  ignition, 
  no 
  sulphur 
  trioxide 
  is 
  volatilized 
  in 
  

   the 
  presence 
  of 
  sodium 
  tungstate. 
  The 
  water 
  of 
  crystallization 
  

   of 
  these 
  sulphates 
  may, 
  therefore, 
  be 
  determined 
  in 
  a 
  remark- 
  

   ably 
  short 
  time 
  and 
  with 
  great 
  accuracy 
  with 
  the 
  use 
  of 
  this 
  

   flux, 
  and 
  the 
  advantage 
  to 
  be 
  derived 
  is 
  obvious 
  and 
  needs 
  no 
  

   particular 
  comment. 
  

  

  In 
  the 
  case 
  of 
  an 
  acidic 
  sulphate 
  the 
  entire 
  amount 
  of 
  the 
  

   acidic 
  oxide 
  will 
  be 
  retained 
  by 
  the 
  tungstate, 
  and 
  the 
  water 
  of 
  

   constitution 
  as 
  well 
  as 
  the 
  water 
  of 
  crystallization 
  will 
  be 
  evolved. 
  

  

  The 
  extension 
  of 
  the 
  use 
  of 
  this 
  flux 
  to 
  the 
  estimation 
  of 
  

   water 
  in 
  salts 
  other 
  than 
  sulphates 
  is, 
  for 
  lack 
  of 
  time, 
  left 
  to 
  

   some 
  future 
  date. 
  

  

  