﻿308 
  /S. 
  B. 
  Kuzirian 
  — 
  Use 
  of 
  the 
  Soditim 
  Paratungstate. 
  

  

  In 
  determinations 
  Nos. 
  1 
  and 
  2, 
  the 
  mixtures 
  were 
  ignited 
  

   with 
  the 
  blowpipe 
  flame 
  for 
  nine 
  minutes 
  without 
  first 
  bring- 
  

   ing 
  the 
  mixture 
  to 
  quiet 
  fusion 
  with 
  a 
  Bunsen 
  flame 
  and 
  the 
  

   large 
  positive 
  errors 
  are 
  without 
  doubt 
  due 
  to 
  the 
  consequent 
  

   mechanical 
  losses. 
  Nos. 
  3, 
  4, 
  5, 
  and 
  6 
  were 
  subjected 
  to 
  the 
  

   blowpipe 
  flame 
  for 
  seven 
  minutes, 
  after 
  observing 
  all 
  the 
  pre- 
  

   cautions. 
  A 
  chlorocbromic 
  anhydride 
  test 
  of 
  the 
  residue 
  failed 
  

   to 
  give 
  any 
  indication 
  of 
  chlorine. 
  It 
  is 
  curious 
  to 
  note 
  that 
  

   the 
  expulsion 
  of 
  volatile 
  matter 
  is 
  accomplished 
  in 
  the 
  case 
  of 
  

   a 
  chlorate 
  in 
  a 
  shorter 
  time 
  than 
  with 
  chlorides, 
  a 
  fact 
  which 
  

   can 
  be 
  accounted 
  for 
  upon 
  the 
  assumption 
  that 
  the 
  oxygen 
  of 
  

   the 
  chlorate 
  is 
  not 
  all 
  liberated 
  in 
  the 
  first 
  stage 
  of 
  reaction, 
  

   but 
  it 
  remains 
  partially 
  to 
  take 
  part 
  in 
  the 
  interaction, 
  thus 
  

   shortening 
  the 
  necessary 
  duration 
  of 
  the 
  blast 
  ignition. 
  

  

  Sodium 
  bromide. 
  — 
  The 
  decomposition 
  of 
  bromides 
  with 
  the 
  

   expulsion 
  of 
  the 
  volatile 
  acid 
  radical 
  is 
  achieved 
  with 
  more 
  

   ease 
  than 
  that 
  of 
  chlorides. 
  As 
  previously 
  shown, 
  the 
  tendency 
  

   toward 
  decomposition 
  increases 
  with 
  the 
  rise 
  in 
  the 
  atomic 
  

   weight 
  of 
  the 
  halogen. 
  

  

  Following 
  are 
  some 
  of 
  the 
  results 
  obtained 
  when 
  C. 
  P. 
  

   sodium 
  bromide 
  was 
  acted 
  upon 
  with 
  the 
  flux 
  in 
  presence 
  of 
  

   steam 
  produced 
  in 
  the 
  blowpipe 
  flame 
  directed 
  from 
  above 
  

   upon 
  the 
  mixture 
  : 
  

  

  

  

  

  

  Table 
  III. 
  

  

  

  

  

  Analysis 
  of 
  

  

  O. 
  

  

  P. 
  Sodium 
  

  

  Bromide 
  of 
  

  

  Commerce, 
  

  

  after 
  Drying. 
  

  

  

  NaBr 
  

  

  Na 
  10 
  W 
  12 
  O 
  4 
  i 
  

  

  Loss 
  on 
  

  

  Theory 
  

  

  

  

  taken 
  

  

  

  taken 
  

  

  ignition 
  

  

  for 
  loss 
  

  

  Error 
  

  

  No 
  

  

  grm. 
  

  

  

  grm. 
  

  

  grm. 
  

  

  grm. 
  

  

  grm. 
  

  

  1 
  

  

  0-1932 
  

  

  

  2 
  

  

  0-1354 
  

  

  0-1350 
  

  

  + 
  0-0004 
  

  

  2 
  

  

  0-2000 
  

  

  

  2 
  

  

  0-1397 
  

  

  0-1398 
  

  

  —o-oooi 
  

  

  3 
  

  

  0-2000 
  

  

  

  2 
  

  

  0-1397 
  

  

  0-1398 
  

  

  — 
  0-0007 
  

  

  4 
  

  

  0-2000 
  

  

  

  2 
  

  

  0*1392 
  

  

  0-1398 
  

  

  — 
  0-0006 
  

  

  The 
  actual 
  and 
  theoretical 
  losses 
  agree 
  within 
  the 
  range 
  of 
  

   experimental 
  error. 
  The 
  average 
  duration 
  of 
  ignition 
  was 
  

   about 
  nine 
  minutes. 
  

  

  All 
  the 
  precautions 
  applicable 
  in 
  the 
  case 
  of 
  chlorides 
  are 
  

   applied 
  in 
  the 
  treatment 
  of 
  bromides. 
  

  

  Potassium, 
  bromate. 
  — 
  The 
  analysis 
  of 
  potassium 
  bromate 
  

   was 
  carried 
  under 
  the 
  same 
  conditions, 
  with 
  all 
  the 
  precautions 
  

   that 
  were 
  applied 
  to 
  chlorates. 
  The 
  results 
  obtained 
  are 
  

   shown 
  in 
  Table 
  IV. 
  

  

  The 
  average 
  duration 
  of 
  ignition 
  in 
  the 
  above 
  determination 
  

   was 
  twelve 
  to 
  fifteen 
  minutes. 
  

  

  Potassium 
  jper 
  chlorate. 
  — 
  In 
  the 
  description 
  of 
  the 
  analysis 
  

   of 
  chlorates 
  with 
  the 
  use 
  of 
  sodium 
  paratungstate, 
  it 
  was 
  shown, 
  

  

  