SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Stoilova, D.; Bulg. Chem. Commun. 25, 249-57 (1992).
Conditions:
Room Temp: Composition at 25 °C
Compilers:
St. Trendafilova, Chr. Balarew
Methodology:
The method used was the isothermal decrease of supersaturation. Equilibrium was reached in about two days. The zinc content was determined complexometrically. The chloride ion content was determined volumetrically by the Mohr method. The metal formate concentration was estimated by difference. The composition of the ideally suction-dried solid phase was determined by the Schreinemakers method. X-ray diffraction and DT analysis were also carried out.
Sample Information:
- The zinc chloride was p.a. grade (Merck). The zinc formate was prepared by the reaction of dilute formic acid with p.a. grade zinc oxide.
Measurement Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
System Components:
- Zinc formate, $\ce{ Zn(CHO2)2 }$; [557-41-5] NIST WebBook
- Zinc chloride, $\ce{ ZnCl2 }$; [7646-85-7] 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 |
|---|---|---|---|---|
| 5.38 | - | 0.371 | - | A |
| 5.16 | 10.79 | 0.400 | 0.942 | A |
| 6.58 | 29.46 | 0.671 | 3.38 | A |
| 6.70 | 36.96 | 0.775 | 4.814 | A |
| 7.11 | 41.19 | 0.896 | 5.846 | A |
| 6.56 | 47.25 | 0.926 | 7.506 | A |
| 8.29 | 51.18 | 1.333 | 9.265 | A |
| 12.08 | 54.77 | 2.362 | 12.105 | A |
| 11.78 | 54.90 | 2.305 | 12.089 | Eutonic |
| 11.31 | 56.62 | 2.299 | 12.954 | B |
| 9.50 | 58.10 | 1.911 | 13.158 | B |
| 5.20 | 64.58 | 1.122 | 15.681 | B |
| 2.45 | 71.54 | 0.614 | 20.183 | B |
| 2.42 | 72.88 | 0.639 | 21.651 | B |
| 1.78 | 76.58 | 0.536 | 25.967 | B |
| - | 80.50 | - | 30.292 | C |
(a) The molality values were calculated by the compilers.
(b) The solid phases are: A = Zn(CHO2)2·2H2O; B = Zn(CHO2)2·2ZnCl2·4H2O; C = 3ZnCl2·4H2O.
