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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Ammonium formate with Water
Components:
(1) Ammonium formate; NH4CHO2; [540-69-2]
NIST Chemistry WebBook
for detail
(2) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Groschuff, E., Ber Dtsch. Chem. Ges. 36, 1783, 4351 (1903).
Variables:
Temperature = -1 ºC to -116 ºC
Prepared By:
Chr. Balarew and St. Trendafilova
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Composition of equilibrium liquid phase.
t/°C
Phase
Mass Fraction w
1
m
1
[mol kg-1]
a
Solid Phase(s)
-1
Liquid
50.0
15.9
NH4CHO2
+12.5
Liquid
55.6
19.9
NH4CHO2
20.0
Liquid
58.9
22.7
NH4CHO2
29.0
Liquid
62.5
26.4
NH4CHO2
39.0
Liquid
66.7
31.8
NH4CHO2
63.5
Liquid
76.9
52.8
NH4CHO2
116.0
Liquid
100.0
---
Melting point (b)
Notes:
a
These values were calculated by the compilers.
b
Melting point.
Method/Apparatus/Procedure:
The precise quantities of solute and solvent are weighed and mixed. After the solute has completely dissolved the mixture is cooled until a small quantity of precipitate is formed. The temperature at which the solid disappears is measured.
Source and Purity of Materials:
No information is given.
Estimated Errors:
Solubility: There is some error due to loss of ammonia vapor, but this was not evaluated quantitatively.