﻿jS. 
  B. 
  Kuzirian 
  — 
  Action 
  of 
  Sodium 
  Paratung 
  state. 
  303 
  

  

  The 
  constancy 
  of 
  weight 
  of 
  the 
  sodium 
  paratnngstate 
  is 
  to 
  

   be 
  tested 
  from 
  time 
  to 
  time 
  by 
  fusing 
  and 
  weighing 
  over 
  

   again. 
  The 
  iodide 
  may 
  be 
  added 
  to 
  the 
  cooled 
  solid 
  mass 
  and 
  

   ignited 
  to 
  expel 
  iodine. 
  The 
  name 
  should 
  be 
  regulated 
  to 
  

   obviate 
  undue 
  violence 
  of 
  action, 
  which 
  may 
  be 
  a 
  source 
  of 
  

   mechanical 
  loss. 
  A 
  gentle 
  ignition 
  of 
  from 
  seven 
  to 
  ten 
  

   minutes 
  was 
  sufficient 
  to 
  obtain 
  the 
  results 
  in 
  the 
  above 
  table. 
  

  

  It 
  is 
  of 
  interest 
  to 
  note 
  that 
  with 
  the 
  use 
  of 
  this 
  flux 
  the 
  

   clecomposibility 
  of 
  the 
  halogen 
  salt 
  (the 
  fluoride 
  being 
  an 
  

   exception) 
  increases 
  with 
  rise 
  in 
  the 
  atomic 
  weight 
  of 
  the 
  

   halogen. 
  Thus 
  iodine 
  (with 
  an 
  atomic 
  weight 
  of 
  126-92) 
  is 
  

   completely 
  expelled 
  from 
  iodides 
  with 
  the 
  use 
  of 
  paratungstate. 
  

   Bromine 
  (with 
  an 
  atomic 
  weight 
  of 
  79'94) 
  is 
  decomposed 
  to 
  

   the 
  extent 
  of 
  60 
  per 
  cent 
  approximately. 
  Chlorine 
  (with 
  an 
  

   atomic 
  weight 
  of 
  35*46) 
  is 
  decomposed 
  to 
  the 
  extent 
  of 
  46 
  per 
  

   cent 
  approximately. 
  According 
  to 
  this 
  observation 
  it 
  would 
  

   naturally 
  be 
  expected 
  that 
  fluorine 
  (with 
  an 
  atomic 
  weight 
  of 
  

   19) 
  would 
  stand 
  in 
  its 
  proper 
  place, 
  with 
  a 
  less 
  degree 
  of 
  

   decomposition 
  than 
  chlorine 
  ; 
  but 
  instead, 
  it 
  stands 
  between 
  

   bromine 
  and 
  chlorine, 
  being 
  decomposible 
  under 
  similar 
  condi- 
  

   tions 
  to 
  the 
  extent 
  of 
  57 
  per 
  cent 
  approximately. 
  It 
  seems 
  

   plausible, 
  however, 
  that 
  the 
  seemingly 
  high 
  susceptibility 
  of 
  

   the 
  fluoride 
  to 
  atmospheric 
  action 
  was 
  in 
  reality 
  due 
  to 
  the 
  

   hygroscopic 
  condition 
  of 
  the 
  fluoride 
  when 
  it 
  was 
  submitted 
  

   to 
  the 
  action 
  of 
  the 
  paratungstate. 
  

  

  Salts 
  of 
  Oxy-halogen 
  Acids. 
  

  

  The 
  action 
  of 
  sodium 
  paratungstate 
  upon 
  salts 
  of 
  the 
  halo- 
  

   gens 
  having 
  been 
  shown 
  to 
  be 
  incomplete, 
  with 
  the 
  exception 
  

   of 
  iodides, 
  it 
  is 
  interesting 
  to 
  note 
  the 
  action 
  of 
  the 
  same 
  flux 
  

   upon 
  some 
  salts 
  of 
  oxy-halogen 
  acids 
  — 
  namely, 
  chlorates, 
  per- 
  

   chlorates, 
  bromates 
  and 
  iodates 
  — 
  in 
  a 
  state 
  of 
  fusion. 
  In 
  view 
  

   of 
  the 
  varying 
  facility 
  with 
  which 
  chlorides, 
  bromides 
  and 
  

   iodides, 
  respectively, 
  undergo 
  decomposition, 
  it 
  is 
  natural 
  to 
  

   expect, 
  as 
  proves 
  to 
  be 
  the 
  case, 
  that 
  the 
  order 
  of 
  decomposi- 
  

   tion 
  will 
  be 
  the 
  same 
  for 
  the 
  oxygen 
  salts. 
  

  

  Under 
  similar 
  conditions 
  of 
  experimentation 
  chlorates 
  were 
  

   decomposed 
  to 
  about 
  40 
  per 
  cent, 
  bromates 
  to 
  67 
  per 
  cent 
  and 
  

   iodates 
  completely, 
  in 
  ten 
  minutes' 
  fusion. 
  In 
  the 
  case 
  of 
  

   iodates, 
  a 
  fusion 
  of 
  from 
  four 
  to 
  seven 
  minutes 
  proved 
  to 
  be 
  

   sufficient 
  to 
  eliminate 
  all 
  the 
  iodine. 
  

  

  In 
  the 
  process 
  of 
  fusion 
  oxygen 
  first 
  begins 
  to 
  escape 
  and 
  

   the 
  evolution 
  of 
  halogen 
  is 
  rapid. 
  When 
  the 
  oxygen 
  of 
  the 
  

   salt 
  has 
  all 
  been 
  expelled, 
  the 
  reaction 
  proceeds 
  very 
  slowly, 
  

   as 
  it 
  has 
  to 
  depend 
  upon 
  the 
  atmospheric 
  oxygen 
  or 
  moisture 
  

   to 
  do 
  the 
  work. 
  The 
  experimental 
  tests 
  showed 
  that 
  neither 
  

  

  