﻿FOR 
  OBTAINING 
  CAPRIC 
  ACID. 
  221 
  

  

  f-3759 
  grammes 
  of 
  substance 
  gave 
  

   •9558 
  ••• 
  of 
  carbonic 
  acid, 
  and 
  

   •3930 
  ... 
  of 
  water. 
  

  

  f-3176 
  grammes 
  of 
  substance 
  gave 
  

   •8080 
  ... 
  of 
  carbonic 
  acid, 
  and 
  

   •3330 
  ... 
  of 
  water. 
  

  

  

  

  Theory 
  

  

  

  

  Experiment. 
  

  

  

  

  

  

  

  I. 
  

  

  II. 
  

  

  Mean. 
  

  

  c 
  20 
  • 
  

  

  120 
  

  

  

  69-76 
  

  

  69-35 
  

  

  69-38 
  

  

  69-36 
  

  

  H 
  20 
  • 
  

  

  20 
  

  

  

  11-62 
  

  

  11-61 
  

  

  11-65 
  

  

  11-63 
  

  

  o, 
  ■ 
  

  

  32 
  

  

  

  18-62 
  

  

  ... 
  

  

  ... 
  

  

  

  172 
  100-00 
  

  

  Caprate 
  of 
  Silver. 
  

  

  This 
  salt 
  is 
  formed 
  when 
  AgO, 
  N0 
  5 
  is 
  added 
  to 
  a 
  slightly 
  ammoniacal 
  solu- 
  

   tion 
  of 
  capric 
  acid. 
  It 
  is 
  insoluble 
  in 
  cold 
  water, 
  sparingly 
  soluble 
  in 
  boiling 
  

   water, 
  and 
  is 
  deposited 
  again 
  on 
  cooling 
  in 
  needle-shaped 
  crystals. 
  It 
  is 
  more 
  

   soluble 
  in 
  boiling 
  alcohol, 
  but 
  the 
  solution 
  becomes 
  dark-coloured, 
  and 
  the 
  crystals 
  

   deposited 
  from 
  it 
  are 
  also 
  dark-coloured. 
  Gorgey 
  also 
  observed 
  this 
  change. 
  It 
  

   is 
  very 
  soluble 
  in 
  ammonia, 
  and 
  if 
  the 
  ammoniacal 
  solution 
  be 
  kept 
  in 
  a 
  warm 
  

   place, 
  so 
  as 
  to 
  drive 
  off 
  the 
  ammonia, 
  a 
  crystalline 
  salt 
  is 
  obtained 
  ; 
  but 
  not 
  hav- 
  

   ing 
  a 
  sufficient 
  quantity, 
  no 
  examination 
  of 
  this 
  compound 
  was 
  made. 
  The 
  silver 
  

   salt 
  whilst 
  moist 
  is 
  rapidly 
  blackened, 
  if 
  exposed 
  to 
  bright 
  daylight; 
  but 
  after 
  

   drying 
  it 
  may 
  be 
  exposed 
  to 
  the 
  light 
  without 
  undergoing 
  any 
  change. 
  The 
  

   silver 
  salt 
  for 
  analysis 
  was 
  precipitated 
  and 
  washed 
  during 
  the 
  evening, 
  dried 
  in 
  

   vacuo 
  over 
  sulphuric 
  acid, 
  the 
  receiver 
  being 
  covered 
  with 
  a 
  cloth, 
  to 
  prevent 
  the 
  

   access 
  of 
  light 
  to 
  it 
  ; 
  it 
  was 
  then 
  dried 
  in 
  a 
  water-bath 
  at 
  212° 
  Fahr. 
  

  

  {•' 
  

  

  2485 
  grammes 
  of 
  silver 
  salt 
  gave 
  

   0951 
  ... 
  of 
  silver. 
  

  

  TT 
  f 
  -3050 
  grammes 
  of 
  silver 
  salt 
  gave 
  

   1-1175 
  ... 
  of 
  silver. 
  

  

  TTT 
  f 
  -2715 
  grammes 
  of 
  silver 
  salt 
  gave 
  

   1JX 
  [-1050 
  ... 
  of 
  silver. 
  

  

  {•4265 
  grammes 
  of 
  silver 
  salt 
  gave 
  

   •6650 
  ... 
  of 
  carbonic 
  acid, 
  and 
  

   •2617 
  ... 
  of 
  water. 
  

   {•3402 
  grammes 
  of 
  silver 
  salt 
  gave 
  

   •5282 
  ... 
  of 
  carbonic 
  acid, 
  and 
  

   •2062 
  ... 
  of 
  water. 
  

  

  Theory. 
  Found. 
  

  

  I. 
  II. 
  III. 
  IV. 
  V. 
  Mean. 
  

  

  O 
  20 
  . 
  120 
  43-01 
  ... 
  ... 
  ... 
  42-52 
  42-34 
  42-43 
  

  

  H 
  19 
  . 
  19 
  6-81 
  ... 
  ... 
  ... 
  6-81 
  6-73 
  6-77 
  

  

  4 
  . 
  32 
  11-47 
  

  

  Ag 
  . 
  108 
  38-71 
  38-27 
  38-52 
  38-67 
  ... 
  ... 
  38-49 
  

  

  279 
  100-00 
  

  

  