﻿and 
  Fluidity 
  of 
  Sodium 
  Chloride 
  Solutions. 
  

  

  Table 
  VI. 
  — 
  Specific 
  Molecular 
  Conductivities. 
  

  

  NaCl 
  Solutions. 
  

  

  495 
  

  

  1 
  

  

  1 
  

  

  1 
  Temp. 
  

  

  1 
  

  

  

  

  NaCl 
  Solutions. 
  

  

  

  % 
  5 
  =0-l 
  

  

  0-2 
  

  

  0-5 
  

  

  1-0 
  

  

  2-0 
  

  

  4 
  

   32-30 
  

  

  0°C. 
  

  

  59-38 
  

  

  56-97 
  

  

  53-75 
  

  

  47-85 
  

  

  39-78 
  

  

  10 
  

  

  78-48 
  

  

  73-70 
  

  

  69-37 
  

  

  61-25 
  

  

  5411 
  

  

  41-36 
  

  

  15 
  

  

  88-54 
  

  

  83-12 
  

  

  77-78 
  

  

  6916 
  

  

  60-60 
  

  

  45-88 
  

  

  18 
  

  

  94-76 
  

  

  89-20 
  

  

  82-76 
  

  

  7406 
  

  

  6443 
  

  

  48-95 
  

  

  20 
  

  

  98-88 
  

  

  9360 
  

  

  86-56 
  

  

  77-55 
  

  

  67-10 
  

  

  50-95 
  

  

  30 
  

  

  122-15 
  

  

  114-47 
  

  

  106-10 
  

  

  94-71 
  

  

  80-28 
  

  

  62-37 
  

  

  40 
  

  

  145-8 
  

  

  136-3 
  

  

  1250 
  

  

  112-4 
  

  

  94-47 
  

  

  74-28 
  

  

  50 
  

  

  171-3 
  

  

  158-5 
  

  

  144-3 
  

  

  130-9 
  

  

  110-7 
  

  

  86-36 
  

  

  60 
  

  

  197-7 
  

  

  183-2 
  

  

  164-6 
  

  

  1506 
  

  

  129-3 
  

  

  99-06 
  

  

  70 
  

  

  224 
  2 
  

  

  206-6 
  

  

  184-5 
  

  

  1710 
  

  

  148-5 
  

  

  1111 
  

  

  80 
  

  

  252 
  3 
  

  

  232-2 
  

  

  205-9 
  

  

  191-0 
  

  

  166-9 
  

  

  123-7 
  

  

  90 
  

  

  281-0 
  

  

  258-7 
  

  

  230-6 
  

  

  210-2 
  

  

  183-3 
  

  

  133-4 
  

  

  100 
  

  

  3141 
  

  

  290-0 
  

  

  2574 
  

  

  228-8 
  

  

  198-1 
  

  

  148-7 
  

  

  Using 
  now 
  the 
  figures 
  contained 
  in 
  Tables 
  IT., 
  V., 
  and 
  VI., 
  

   two 
  sets 
  of 
  isothermal 
  curves 
  were 
  drawn, 
  one 
  set 
  having 
  

   fluidity 
  as 
  ordinates 
  and 
  absolute 
  concentration 
  as 
  abscissae, 
  

   and 
  the 
  other 
  set 
  having 
  specific 
  molecular 
  conductivity 
  as 
  

   ordinates 
  and 
  absolute 
  concentration 
  as 
  abscissae. 
  

  

  The 
  fluidity-concentration 
  isothermals 
  are, 
  with 
  a 
  slight 
  

   deviation 
  for 
  weak 
  solutions 
  near 
  the 
  freezing- 
  and 
  boiling- 
  

   points, 
  straight 
  lines 
  meeting 
  very 
  approximately 
  in 
  a 
  point 
  

   on 
  the 
  axis 
  of 
  nbscissse 
  for 
  which 
  the 
  concentration 
  c 
  is 
  10*74. 
  

  

  Hence 
  these 
  isothermals 
  can 
  be 
  expressed 
  by 
  the 
  formula 
  

  

  F 
  = 
  A(10-74-c), 
  

  

  where 
  X 
  is 
  a 
  function 
  of 
  the 
  temperature 
  only. 
  

  

  The 
  actual 
  deviations 
  of 
  the 
  experimental 
  results 
  from 
  this 
  

   empirical 
  formula 
  only 
  occur, 
  as 
  already 
  mentioned, 
  in 
  the 
  

   case 
  of 
  weak 
  solutions 
  near 
  0° 
  C. 
  and 
  100° 
  C, 
  F 
  being 
  

   slightly 
  greater 
  near 
  100° 
  C. 
  and 
  being 
  slightly 
  less 
  near 
  

   0° 
  C. 
  than 
  the 
  formula 
  indicates. 
  

  

  The 
  sp. 
  mol. 
  conductivity-concentration 
  isothermals 
  were 
  

   not 
  so 
  simple. 
  For 
  concentrations 
  greater 
  than 
  1 
  gr.-mol. 
  

   they 
  were 
  approximately 
  straight 
  lines 
  apparently 
  meeting 
  

   at 
  the 
  same 
  point 
  on 
  the 
  axis 
  of 
  abscissas 
  as 
  the 
  fluidity- 
  

   concentration 
  isothermals, 
  but 
  sufficient 
  experiments 
  have 
  

   not 
  been 
  carried 
  out 
  to 
  properly 
  test 
  this. 
  For 
  concentrations 
  

   less 
  than 
  1 
  gr.-mol. 
  these 
  isothermals 
  curve 
  up, 
  showing 
  as 
  

   they 
  ought 
  an 
  accelerated 
  increase 
  in 
  sp.-mol. 
  conductivity 
  

   as 
  the 
  solution 
  becomes 
  more 
  dilute. 
  

  

  2 
  L 
  2 
  

  

  