﻿548 
  Van 
  Name 
  and 
  Hill 
  — 
  Alcohol 
  and 
  Cane 
  Sugar. 
  

  

  Table 
  III. 
  

  

  Ki 
  — 
  velocity 
  constant, 
  corrected 
  for 
  variation 
  in 
  rate 
  of 
  stirring 
  and 
  for 
  

   evaporation. 
  K=most 
  probable 
  value 
  by 
  extrapolation. 
  

  

  Cane 
  Sugar 
  ^ 
  s 
  molar. 
  

  

  1. 
  

  

  v 
  = 
  

  

  580 
  

  

  560 
  

  

  540 
  520 
  500 
  

  

  480 
  

  

  460 
  cc 
  

  

  

  

  & 
  = 
  

  

  6*94 
  

  

  6-82 
  

  

  6-93 
  6'72 
  6-80 
  

  

  6-78 
  

  

  6-78 
  

  

  690 
  

  

  2. 
  

  

  K 
  = 
  

  

  6-81 
  

  

  6-76 
  

  

  6-92 
  6-72 
  6*74 
  

   Cane 
  Sugar 
  T 
  \ 
  molar. 
  

  

  6-80 
  

  

  6-66 
  

  

  683 
  

  

  3. 
  

  

  K 
  = 
  

  

  6-65 
  

  

  6'78 
  

  

  663 
  6-63 
  6-48 
  

  

  6-66 
  

  

  6-53 
  

  

  6-71 
  

  

  4. 
  

  

  x>= 
  

  

  '6*58 
  

  

  — 
  

  

  6-70 
  6-57 
  640 
  

   Cane 
  Sugar 
  -J- 
  molar. 
  

  

  6*64 
  

  

  6-63 
  

  

  6-66 
  

  

  5. 
  

  

  K 
  = 
  

  

  6-32 
  

  

  625 
  

  

  6'42 
  6*26 
  6-31 
  

  

  626 
  

  

  6-25 
  

  

  6-36 
  

  

  6. 
  

  

  K 
  = 
  

  

  6-23 
  

  

  6*34 
  

  

  6-28 
  6*28 
  6-29 
  

  

  6-01 
  

  

  6-30 
  

  

  6-30 
  

  

  7. 
  

  

  K 
  = 
  

  

  618 
  

  

  6*34 
  

  

  6-13 
  6-32 
  6-17 
  

  

  6-12 
  

  

  6'15 
  

  

  6-24 
  

  

  Cane 
  Sugar 
  T 
  \ 
  molar. 
  

   8. 
  K= 
  6-01 
  5-94 
  5-88 
  5'99 
  5'87 
  5'83 
  5'81 
  5*99 
  

  

  Cane 
  Sugar 
  \ 
  molar. 
  

  

  9. 
  

  

  K 
  = 
  

  

  5-52 
  

  

  5-53 
  

  

  5'51 
  5-44 
  5-52 
  

  

  5-56 
  

  

  5'44 
  

  

  5-52 
  

  

  10. 
  

  

  ■*;= 
  

  

  5-49 
  

  

  5-61 
  

  

  5-53 
  5'54 
  5-50 
  

  

  5-48 
  

  

  5-46 
  

  

  5-57 
  

  

  11. 
  

  

  k= 
  

  

  5*42 
  

  

  5-70 
  

  

  5-63 
  5-50 
  5-57 
  

   Cane 
  Sugar 
  $ 
  molar. 
  

  

  5-48 
  

  

  5-55 
  

  

  5-59 
  

  

  12. 
  

  

  &*= 
  

  

  4-27 
  

  

  421 
  

  

  4-24 
  4-05 
  4-28 
  

  

  4-15 
  

  

  4-13 
  

  

  4-26 
  

  

  13. 
  

  

  k= 
  

  

  4-26 
  

  

  4-28 
  

  

  4-16 
  4-21 
  4-20 
  

   Cane 
  Sugar 
  1-molar. 
  

  

  4-12 
  

  

  4-16 
  

  

  4-26 
  

  

  14. 
  

  

  k= 
  

  

  2'20 
  

  

  2-27 
  

  

  2-29 
  2-27 
  2-29 
  

  

  2-23 
  

  

  2-26 
  

  

  2-27 
  

  

  15. 
  

  

  k= 
  

  

  2-24 
  

  

  2-32 
  

  

  2-29 
  2-35 
  2-27 
  

  

  2*27 
  

  

  230 
  

  

  230 
  

  

  course 
  of 
  the 
  experiment. 
  It 
  is 
  almost 
  certain 
  that 
  this 
  is 
  due 
  

   to 
  a 
  gradual 
  liberation 
  of 
  iodine 
  in 
  the 
  acidified 
  iodide 
  solu- 
  

   tion, 
  induced 
  by 
  the 
  stirring 
  in 
  contact 
  with 
  air. 
  Strangely 
  

   enough, 
  this 
  effect, 
  so 
  persistent 
  here, 
  had 
  been 
  negligible 
  or 
  

   wholly 
  absent 
  in 
  several 
  previous 
  series 
  of 
  experiments 
  under 
  

   apparently 
  similar 
  conditions, 
  and 
  for 
  this 
  reason 
  the 
  explana- 
  

   tion 
  given 
  above 
  was 
  not 
  accepted 
  until 
  after 
  much 
  time 
  had 
  

   been 
  spent 
  in 
  an 
  unsuccessful 
  effort 
  to 
  find 
  some 
  other 
  adequate 
  

   one. 
  As 
  it 
  is, 
  no 
  reason 
  is 
  apparent 
  for 
  the 
  more 
  rapid 
  oxida- 
  

   tion 
  in 
  the 
  present 
  series 
  of 
  experiments, 
  unless 
  it 
  be 
  justifiable 
  

   to 
  ascribe 
  it 
  to 
  some 
  slight 
  difference 
  in 
  the 
  purity 
  of 
  the 
  

   reagents 
  used. 
  

  

  Although 
  the 
  rate 
  of 
  decrease 
  of 
  the 
  constants 
  is 
  of 
  the 
  same 
  

   order 
  of 
  magnitude 
  in 
  most 
  cases, 
  the 
  presence 
  of 
  this 
  effect 
  

  

  