SDS Volume

Volume 73. Metal and Ammonium Formate Systems, p None

Source Publication

Gauthier, J.; Thèses faculté des sciences de l'université de Paris, 65-71 (1958).

Conditions:

Room Temp: -0.595 - 64 °C

Compiler:

Chr. Balarew

Methodology:

It appears that the isothermal method was used. Above 0°C a Dewar flask with a Robertean thermometer graduated in 0.01 °C was used. Below 0 °C a mixture of water and salt was used to cool a jacket containing acetone or methanol. The copper content was determined electrolytically.

Sample Information:
  1. Distilled water was used.
Measurement Errors:

Mass concentration (m/v) (1): ±0.07 mass% (from the eutectic point).

System Components:
  1. Copper (II) formate, $\ce{ Cu(CHO2)2 }$; [544-19-4] NIST WebBook
  2. Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
$T$ (°C) 100w1 m1 (mol/kg) a Phase (s) () b
-0.155 0.59 0.0386Ice
-0.275 1.19 0.0784Ice
-0.285 1.27 0.0840Ice
-0.345 1.52 0.1003Ice
-0.375 1.71 0.1131Ice
-0.445 2.07 0.1378Ice
-0.505 2.41 0.1610Ice
-0.515 2.44 0.1630Ice
-0.555 2.71 0.1814Ice
-0.585 2.86 0.1914Ice + A
-0.57 2.92 0.1956Ice + A
-0.595 2.96 0.1988-
0 2.97 0.1996A
10 4.63 0.3162A
15 6.07 0.4206A
20 7.32 0.5141A
25 9.92 0.7172A
30 11.73 0.8652A
35 16.64 1.3000A
56 24.67 2.132B
64 31.12 2.942B

(a) These values were calculated by the compiler.

(b) The solid phases are: A = Cu(CHO2)2·4H2O, B = Cu(CHO2)2·2H2O.

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