﻿S. 
  B. 
  Kuzirian 
  — 
  Use 
  of 
  the 
  Sodium 
  Paratungstate. 
  307 
  

  

  fused 
  mass 
  for 
  a 
  period 
  of 
  five 
  to 
  eight 
  minutes, 
  until 
  a 
  con- 
  

   stant 
  weight 
  is 
  obtained. 
  

  

  The 
  whole 
  determination 
  can 
  be 
  accomplished 
  in 
  a 
  compara- 
  

   tively 
  short 
  time. 
  

  

  Sodium 
  chloride. 
  — 
  In 
  the 
  table 
  are 
  given 
  the 
  results 
  which 
  

   were 
  obtained 
  by 
  the 
  action 
  of 
  superheated 
  steam 
  upon 
  the 
  

   fused 
  mass 
  of 
  sodium 
  paratungstate 
  and 
  sodium 
  chloride, 
  under 
  

   the 
  conditions 
  specified. 
  

  

  

  

  

  

  Table 
  I. 
  

  

  

  

  

  Analysis 
  

  

  of 
  a 
  p. 
  

  

  Sodium 
  Chloride, 
  after 
  Drying. 
  

  

  

  

  NaCl 
  

  

  Na 
  

  

  ioW 
  12 
  41 
  

  

  Loss 
  on 
  

  

  Theory 
  

  

  

  

  taken 
  

  

  

  taken 
  

  

  ignition 
  

  

  for 
  loss 
  

  

  Error 
  

  

  No. 
  

  

  grm. 
  

  

  

  grm. 
  

  

  grm. 
  

  

  grm. 
  

  

  grm. 
  

  

  1 
  

  

  0-2000 
  

  

  

  2 
  

  

  0-0936 
  

  

  0-0940 
  

  

  — 
  0-0004 
  

  

  2 
  

  

  0-2000 
  

  

  

  2 
  

  

  0-0938 
  

  

  0-0940 
  

  

  — 
  0-0002 
  

  

  3 
  

  

  0*2000 
  

  

  

  2 
  

  

  0-0938 
  

  

  0-0940 
  

  

  — 
  0-0002 
  

  

  4 
  

  

  0-2000 
  

  

  

  2 
  

  

  0-0933 
  

  

  0-0940 
  

  

  — 
  0-0007 
  

  

  Sodium 
  chloride 
  being 
  an 
  extremely 
  stable 
  salt, 
  a 
  prolonged 
  

   ignition 
  of 
  fifteen 
  to 
  twenty 
  minutes 
  was 
  necessary. 
  It 
  was 
  

   customary 
  to 
  weigh 
  after 
  each 
  period 
  of 
  five 
  minutes' 
  ignition 
  

   with 
  the 
  blowpipe, 
  in 
  the 
  manner 
  already 
  specified. 
  The 
  

   residue 
  was 
  tested 
  for 
  chlorine 
  with 
  chromic 
  anhydride 
  test* 
  

   which 
  is 
  sensitive 
  to 
  about 
  0*5 
  mlg. 
  of 
  chloride. 
  No 
  indica- 
  

   tion 
  of 
  chlorine 
  was 
  found. 
  

  

  Potassium 
  chlorate. 
  — 
  Table 
  II 
  shows 
  the 
  results 
  obtained 
  

   when 
  the 
  sodium 
  paratungstate 
  was 
  fused 
  with 
  potassium 
  

   chlorate 
  in 
  the 
  manner 
  already 
  specified, 
  care 
  being 
  taken 
  to 
  

   expel 
  volatile 
  material 
  slowly, 
  thus 
  avoiding 
  possible 
  mechanical 
  

   loss 
  of 
  material 
  due 
  to 
  violent 
  evolution 
  of 
  oxygen. 
  This 
  was 
  

   accomplished 
  by 
  applying 
  a 
  gentle 
  heat 
  of 
  a 
  Bunsen 
  burner 
  

   from 
  beneath 
  the 
  platinum 
  crucible, 
  until 
  quiet 
  fusion 
  took 
  

   place. 
  Then 
  a 
  small 
  blowpipe 
  flame 
  was 
  applied 
  in 
  the 
  man- 
  

   ner 
  described. 
  

  

  

  

  

  Table 
  II. 
  

  

  

  

  Analysis 
  of 
  C 
  

  

  P. 
  Potassium 
  Chlorate 
  

  

  of 
  Commerce, 
  

  

  after 
  Drying. 
  

  

  

  KC10 
  3 
  

  

  Na 
  10 
  W 
  12 
  41 
  

  

  Loss 
  on 
  

  

  Theory 
  

  

  

  

  taken 
  

  

  taken 
  

  

  ignition 
  

  

  for 
  loss 
  

  

  Error 
  

  

  No. 
  

  

  grm. 
  

  

  grm. 
  

  

  grm. 
  

  

  grm. 
  

  

  grm. 
  

  

  1 
  

  

  0-2000 
  

  

  2 
  

  

  0-1241 
  

  

  0-1231 
  

  

  + 
  0-0010 
  

  

  2 
  

  

  0-2000 
  

  

  2 
  

  

  0-1260 
  

  

  0-1231 
  

  

  + 
  0-0029 
  

  

  3 
  

  

  0-2000 
  

  

  2 
  

  

  0-1230 
  

  

  0-1231 
  

  

  — 
  00001 
  

  

  4 
  

  

  0-2000 
  

  

  2 
  

  

  0-1233 
  

  

  0-1231 
  

  

  + 
  0-0002 
  

  

  5 
  

  

  0-2000 
  

  

  2 
  

  

  0-1233 
  

  

  0-1231 
  

  

  + 
  0-0002 
  

  

  6 
  

  

  0-2000 
  

  

  2 
  

  

  0-1237 
  

  

  0-1231 
  

  

  + 
  0-0006 
  

  

  Gooeh 
  and 
  Brooks, 
  this 
  Journal 
  (3), 
  xi, 
  283. 
  

  

  