SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Portnova, S. M.; Palitskaya, T. A.; Zh. Neorg. Khim. 37, 2126-31 (1992).
Conditions:
Room Temp: Composition at 25 °C
Compilers:
St. Trendafilova, St. Tepavitcharova
Methodology:
The isothermal solubility method was used. Four weeks were allowed for equilibration. The copper content was determined iodometrically. The lead ion content was determined trilonometrically using Methylthymol Blue as indicator. $\ce{Cu^{2+}}$ is masked with thiocarbamide at pH 5.5-6.0. The composition of the solid phase was determined by the Schreinemakers' method. X-ray diffraction, DT, TG, DTG and T analysis were also used.
Sample Information:
- The copper formate was prepared by the reaction of PA grade $\ce{CuCO3}$ with PA grade formic acid. The calcium formate was prepared by the reaction of pure $\ce{Ca(OH)2}$ with PA grade formic acid.
Measurement Errors:
Ambient temperature: No information given.
Mass concentration (m/v) (1): No information given.
System Components:
- Copper (II) formate, $\ce{ Cu(CHO2)2 }$; [544-19-4] NIST WebBook
- Lead formate, $\ce{ Pb(CHO2)2 }$; [811-54-1] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| 100w1 | 100w2 | m1 (mol/kg) a | m2 (mol/kg) a | Phase (s) () b |
|---|---|---|---|---|
| 2.00 | - | 0.069 | - | A |
| 3.16 | 1.13 | 0.215 | 0.040 | A |
| 5.83 | 1.10 | 0.408 | 0.040 | A |
| 6.23 | 0.98 | 0.437 | 0.036 | A |
| 7.37 | 1.02 | 0.524 | 0.037 | A |
| 8.04 | 0.96 | 0.575 | 0.035 | A |
| 8.83 | 0.99 | 0.638 | 0.037 | A |
| 9.66 | 1.09 | 0.705 | 0.041 | A |
| 9.61 | 1.05 | 0.700 | 0.040 | A + B |
| 9.92 | 0.26 | 0.719 | 0.010 | B |
| - | 9.46 | - | 0.680 | B |
(a) The molality values were calculated by the compilers.
(b) The solid phases are: A = Pb(CHO2)2; B = Cu(CHO2)2ยท4H2O.
