﻿404 
  

  

  Peters 
  — 
  Separation 
  and 
  Determination 
  

  

  with 
  the 
  titration 
  of 
  an 
  oxalate 
  by 
  permanganate 
  as 
  already 
  

   shown. 
  

  

  Carrying 
  out 
  the 
  process 
  of 
  separation 
  of 
  mercurons 
  from 
  

   mercuric 
  salts, 
  the 
  precipitation 
  was 
  made 
  as 
  described 
  for 
  the 
  

   estimation 
  of 
  mercurous 
  salts 
  alone, 
  excepting 
  that 
  nitric 
  acid 
  

   and 
  mercuric 
  salt 
  were 
  added. 
  The 
  experiments 
  in 
  A, 
  B, 
  and 
  

   C, 
  of 
  the 
  accompanying 
  table 
  show 
  the 
  amounts 
  of 
  mercuric 
  

   salt 
  from 
  which 
  the 
  mercurous 
  oxalate 
  may 
  be 
  separated 
  with 
  

   2 
  cm3 
  of 
  nitric 
  acid. 
  In 
  experiments 
  in 
  section 
  A 
  the 
  results 
  are 
  

   quite 
  accurate, 
  but 
  an 
  excess 
  of 
  ammonium 
  oxalate 
  tends 
  to 
  

   increase 
  the 
  results 
  a 
  little 
  as 
  seen 
  in 
  experiments 
  under 
  B. 
  

   An 
  increase 
  in 
  the 
  amount 
  of 
  mercuric 
  salt 
  present 
  causes 
  also, 
  

   as 
  shown 
  in 
  section 
  C, 
  

  

  Hg 
  taken 
  

  

  as 
  

  

  Hg 
  2 
  (N0 
  3 
  ) 
  2 
  

  

  gms. 
  

  

  f 
  0-1217 
  

   I 
  " 
  

  

  I 
  " 
  

   I 
  " 
  

   ( 
  0-1221 
  

   } 
  0-1217 
  

   ( 
  0-1242 
  

   0-1217 
  

  

  B 
  

  

  c 
  

  

  D 
  

  

  £ 
  

  

  EE 
  

  

  F 
  

  

  G 
  

  

  H 
  

  

  I 
  

   K 
  

  

  u 
  

   u 
  

  

  0-2244 
  

   <( 
  

  

  it 
  

  

  a 
  

  

  it 
  

  

  a 
  

  

  0-2424 
  

  

  u 
  

  

  Hg(X0 
  3 
  ) 
  2 
  

   present 
  

  

  calculated 
  

  

  as 
  Hg. 
  

  

  gms. 
  

  

  0-0067 
  

  

  a 
  

  

  a 
  

   it 
  

  

  u 
  

  

  0-0134 
  

  

  0-0067 
  

   u 
  

  

  0-0141 
  

   a 
  

  

  0-0067 
  

  

  the 
  results 
  to 
  be 
  a 
  trifle 
  high. 
  

  

  Ammonium 
  

  

  oxalate 
  

  

  n 
  

   app. 
  

  

  10 
  

  

  in 
  excess. 
  

  

  0-2245 
  0-0134 
  

  

  0-1122 
  

  

  « 
  

  

  0-0144 
  

  

  0-0240 
  

   a 
  

  

  86 
  

   92 
  

   07 
  

   ftO 
  

   91 
  

   92 
  

   93 
  

   75 
  

   87 
  

   SO 
  

   93 
  

   90 
  

  

  88 
  

   91 
  

  

  98 
  

   94 
  

   88 
  

   90 
  

   75 
  

   00 
  

   96 
  

   74 
  

   81 
  

   02 
  

   54 
  

   57 
  

  

  HN0 
  3 
  

   Sp. 
  gr. 
  

  

  115 
  

  

  cm 
  3 
  

  

  2 
  

   a 
  

  

  tt 
  

  

  a 
  

   a 
  

   a 
  

   a 
  

   u 
  

  

  Volume 
  

  

  at 
  

   precipi- 
  

   tation. 
  

  

  100 
  

  

  a 
  

  

  115 
  

  

  130 
  

   100 
  

  

  200 
  

   a 
  

  

  Hg 
  

  

  found. 
  

  

  gms. 
  

  

  0-1232 
  

   0-1220 
  

   0-1218 
  

   0-1224 
  

   0-1213 
  

  

  0-1237 
  

   01235 
  

   0-1263 
  

   0-1230 
  

   0-1232 
  

   0-1218 
  

   0-1211 
  

   0-2244 
  

   0-2240 
  

   0-2230 
  

   0-2241 
  

  

  0-2289 
  

   0-2285 
  

   0-2432 
  

   0-2414 
  

   0-2421 
  

  

  0-2271 
  

   0-2256 
  

   0-1121 
  

   0-1136 
  

   0-1130 
  

  

  Error. 
  

  

  —0-0015 
  

   + 
  0-0003 
  

   -fO-0001 
  

   + 
  0-0007 
  

  

  — 
  0-0004 
  

  

  + 
  0*0016 
  

   + 
  00018 
  

   + 
  0-0021 
  

   + 
  0-0013 
  

   + 
  0-0015 
  

   + 
  00001 
  

  

  — 
  00006 
  

   ±0-0000 
  

   -0-0004 
  

  

  — 
  0-0014 
  

  

  — 
  0-0003 
  

   + 
  0-0045 
  

   + 
  00041 
  

   + 
  0-0008 
  

  

  —o-ooio 
  

  

  — 
  0-0003 
  

   + 
  0-0026 
  

   + 
  0-0012 
  

  

  —o-oooi 
  

  

  + 
  0-0014 
  

   + 
  0-0008 
  

  

  In 
  experiments 
  D, 
  using 
  4 
  cm3 
  of 
  nitric 
  acid 
  even 
  in 
  the 
  

   presence 
  of 
  an 
  excess 
  of 
  ammonium 
  oxalate, 
  the 
  results 
  are 
  

   accurate. 
  In 
  experiments 
  E 
  the 
  amount 
  of 
  mercurous 
  salt 
  

  

  