﻿Frequency 
  and 
  Molecular 
  Number. 
  447 
  

  

  Sodium 
  Compounds 
  (N 
  = 
  ll). 
  

  

  Name. 
  Formula. 
  N. 
  vXlO 
  -12 
  . 
  NvXlO" 
  12 
  . 
  

  

  Sodium 
  

  

  borate 
  tetra- 
  Na 
  2 
  B 
  4 
  7 
  98' 
  1*596 
  7|x20*9 
  

  

  bromate 
  NaBr0 
  3 
  70 
  1-801 
  6 
  x210 
  

  

  bromide 
  NaBr 
  * 
  46 
  3037 
  6fx207 
  

  

  carbonate 
  jS 
  T 
  a 
  o 
  C0 
  3 
  52 
  2-878 
  7 
  X214 
  

  

  chlorate 
  NaC10 
  3 
  52 
  1'962 
  5 
  X20-4 
  

  

  chloride 
  (a) 
  NaCl 
  28 
  4407 
  6x206 
  

  

  fluoride 
  NaF 
  20 
  6794 
  6|x209 
  

  

  hydroxide 
  NaOH 
  20 
  6787 
  6* 
  X 
  20*9 
  

  

  iodide 
  Nal 
  61 
  2*268 
  7 
  x20*7 
  

  

  nitrate 
  NaN0 
  3 
  42 
  -2*417 
  5 
  x203 
  

  

  nitrite 
  (b) 
  NaN0 
  2 
  34 
  2-724 
  41x206 
  

  

  phosphate 
  meta 
  Na 
  4 
  P 
  4 
  O 
  l2 
  200 
  0829 
  8 
  x20*7 
  

  

  sulphate 
  Na 
  2 
  S0 
  4 
  70 
  2*337 
  8 
  x20"4 
  

  

  sulphate 
  acid 
  (c) 
  NaHS0 
  4 
  60 
  1*859 
  5ix20*3 
  

  

  (a) 
  Melting-point 
  of 
  sodium 
  ehloride 
  (801° 
  0.) 
  has 
  been 
  used 
  as 
  a 
  

  

  standard 
  temperature. 
  

  

  (b) 
  Melting-point 
  of 
  sodium 
  nitrite* 
  271° 
  O. 
  (Divers, 
  1899), 
  

  

  (c) 
  Melting-point 
  of 
  NaIiS0 
  4 
  " 
  over 
  315° 
  C." 
  (G-melin-Kraut). 
  

  

  Potassium 
  Compounds 
  (N 
  = 
  19). 
  

  

  Name. 
  Formula. 
  N. 
  »>xl0~ 
  12 
  . 
  NrXlO 
  -12 
  . 
  

   Potassium 
  

  

  arsenate 
  acid 
  KH 
  2 
  As0 
  4 
  86 
  1-364 
  5|x213 
  

  

  bromate 
  KBr0 
  3 
  78 
  1-708 
  6^x20-5 
  

  

  bromide 
  KBr 
  54 
  2-575 
  6fx206 
  

  

  carbonate 
  K 
  C0 
  3 
  68 
  2310 
  7^x210 
  

  

  chlorate 
  KC10 
  3 
  60 
  1-886 
  5£x20*6 
  

  

  chloride 
  KC1 
  36 
  3493 
  6 
  x20*9 
  

  

  chromate 
  K 
  2 
  Cr0 
  4 
  94 
  1*882 
  8^x20-8 
  

  

  dichromate 
  K 
  2 
  Cr 
  2 
  7 
  142 
  °' 
  9 
  74 
  6} 
  x 
  21*4 
  

  

  fluoride 
  KF 
  28 
  4789 
  6^x20-6 
  

  

  formate 
  KCH0 
  2 
  42 
  1955 
  4 
  x205 
  

  

  hydroxide 
  KOH 
  28 
  3*431 
  4§x21*3 
  

  

  iodate 
  KI0 
  3 
  96 
  1609 
  6x20*4 
  

  

  iodide 
  KI 
  72 
  1*988 
  7 
  X20-4 
  

  

  iodide 
  tri- 
  ET 
  3 
  178 
  0543 
  4|x21*5 
  

  

  nitrate 
  KNO, 
  50 
  2-080 
  5 
  x20'8 
  

  

  perchlorate 
  KC10 
  4 
  68 
  2046 
  6fx2l<4 
  

  

  periodate 
  KI0 
  4 
  104 
  1*488 
  7|x206 
  

  

  Pb 
  d°?h 
  P 
  y 
  l* 
  e 
  ogen(«) 
  } 
  ^^ 
  68 
  13 
  ° 
  8 
  ^ 
  X2 
  °- 
  9 
  

  

  sulphate(i) 
  K 
  2 
  S0 
  4 
  86 
  2*121 
  9 
  X203 
  

  

  acid 
  KHS0 
  4 
  68 
  1*536 
  5 
  x20"9 
  

  

  sulphocyanate 
  KCNS 
  48 
  1-778 
  4 
  x21*3 
  

  

  (a) 
  Melting-point 
  of 
  the 
  anhydrous 
  salt, 
  96° 
  C.,'Tilden(1884). 
  

  

  (b) 
  The 
  melting-point 
  of 
  potassium 
  sulphate 
  (1070° 
  C.) 
  is 
  used 
  as 
  a 
  

  

  standard 
  temperature. 
  

  

  The 
  results 
  for 
  sodium 
  and 
  potassium 
  compounds 
  are 
  

   specially 
  interesting, 
  and 
  should 
  be 
  compared 
  with 
  one 
  

   another 
  where 
  that 
  is 
  possible. 
  There 
  are 
  eleven 
  cases 
  in 
  

  

  212 
  

  

  