SDS Volume

Volume 73. Metal and Ammonium Formate Systems, p None

Source Publication

Kalalova, E.; Scientific papers of the Inst. Of Chem. Technol.; Prague 9, 37 (1966).

Conditions:

Room Temp: 0 - 100 °C

Compiler:

T.A. Ageyeva

Methodology:

The isothermal method was used. Equilibrium was reached within 20 h. The copper content was measured by electrolytic deposition at a platinum cathode from a solution acidified with $\ce{HNO3}$. The solid phase was identified by thermogravimetric and X-ray methods. Transition points between phases were determined thermogravimetrically. The solubility of each hydrate and the anhydrous salt were investigated.

Sample Information:

1. $\ce{Cu(CHO2)2.4H2O}$ was prepared by dissolving $\ce{CuO}% in 50% formic acid followed by filtration and drying. Copper content was 28.16 mass% (calcd. value is 28.16 mass%). The dihydrate was prepared by recrystallization of $\ce{Cu(CHO2)2}$ in a thermostat at 323 K followed by filtration and drying at the same temperature. Copper content was 33.45 mass% (calcd. value is 33.52 mass%). Anhydrous $\ce{Cu(CHO2)2}$ was prepared from the dihydrate at 368 K. Copper content was 41.35 mass% (calcd. value is 41.39 mass%). Source and purity of formic acid and water are not described.

Measurement Errors:

Ambient temperature: The temperature was controlled to within ±0.2 K. No other information is given.
Mass concentration (m/v) (1): No information is given.