SDS Volume (4648)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Portnova, S. M.; Krassilov, Yu. I.; Kuznetzov, N. T.; Balakaeva, I. V.; Zh. Neorg. Khim. 35, 237-41 (1990).
Variables:
Room Temp: Composition at 25 °C
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
The isothermal method was used. Four weeks were allowed for equilibration. The $\ce{Y^{3+}}$ content was determined complexometrically. The $\ce{Ba^{2+}}$ content was determined gravimetrically as $\ce{baSO4}$ after the $\ce{Y^{3+}}$ was bound with EDTA. The composition of the solid phases was determined by the Schreinemakers method, by DT analysis and by X-ray fluorescence spectroscopy.
Source and Purity of Materials:
- The formates were obtained by neutralizing dilute formic acid with p.a. grade yttrium or barium oxides.
Estimated Errors:
Ambient temperature: No information given.
Mass concentration (m/v) (1): No information given.
Components:
- Barium formate, $\ce{ Ba(CHO2)2 }$; [541-43-5] NIST WebBook
- Yttrium(III) formate, $\ce{ Y(CHO2)3 }$; [15331-71-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Solubility values in the Ba(CHO2)2-Y(CHO2)3-H2O system at 25°C.
| 100w1 | 100w2 | m1 (mol/kg) | m2 (mol/kg) | Phase (s) () |
|---|---|---|---|---|
| - | 21.41 | 1.216 | - | A |
| 5.47 | 17.19 | 0.311 | 0.992 | A |
| 8.56 | 17.12 | 0.506 | 1.029 | A |
| 12.43 | 16.06 | 0.764 | 1.003 | A |
| 14.24 | 16.20 | 0.900 | 1.040 | A |
| 16.54 | 17.17 | 1.097 | 1.156 | A |
| 16.24 | 16.74 | 1.066 | 1.115 | A |
| 11.22 | 16.90 | 0.686 | 1.050 | A + B |
| 12.74 | 14.06 | 0.765 | 0.858 | B |
| 13.49 | 12.38 | 0.800 | 0.746 | B |
| 14.24 | 11.72 | 0.846 | 0.707 | B |
| 15.23 | 10.88 | 0.906 | 0.657 | B |
| 17.17 | 8.66 | 1.018 | 0.521 | B |
| 19.12 | 7.36 | 1.144 | 0.447 | B |
| 24.18 | 5.34 | 1.509 | 0.338 | B |
| 23.94 | 5.06 | 1.483 | 0.318 | B |
| 24.37 | 4.99 | 1.517 | 0.315 | B |
| 24.34 | 4.98 | 1.514 | 0.315 | B + C |
| 24.37 | 7.87 | 1.582 | 0.519 | C |
| 24.00 | 3.41 | 1.454 | 0.210 | C |
| 24.18 | 2.39 | 1.448 | 0.145 | C |
| 23.72 | 1.17 | 1.389 | 0.070 | C |
| 23.88 | 0.71 | 1.393 | 0.042 | C |
(a) The molality values were calculated by the compilers.
(b) The solid phases are: A = Y(CHO2)3·2H2O; B = BaY(CHO2)5·2H2O; C = Ba(CHO2)2.
