Home
Introduction
Search Menu
IUPAC Series (PDF)
Reference
Version History
About the Project
Disclaimer
Contact Us
Acknowledgements
IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Sodium formate with Formic Acid and Water
Components:
(1) Formic acid; CH2O2; [64-18-6]
NIST Chemistry WebBook
for detail
(2) Sodium formate; NaCHO2; [141-53-7]
NIST Chemistry WebBook
for detail
(3) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Heubel, J.; Coupe, D.; C.R. Acad. Sci. 250, 1058 (1960).
Variables:
Concentration = Composition at 293.2 K
Prepared By:
T. A. Ageyeva
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Solubility values in the NaCHO
2
-CH
2
O
2
-H
2
O system at 293.2 K.
Chemical
1
Mass Fraction w
1
10
0
* Mole Fraction
1
a
Chemical
2
Mass Fraction w
2
Mole Fraction
2
a
Chemical
3
Mass Fraction w
3
Mole Fraction
3
a
Solid Phase(s)
b
NaCHO2
45.25
17.96
CH2O2
0.0
0.0
H2O
54.75
82.04
A
NaCHO2
45.70
18.81
CH2O2
3.31
2.02
H2O
50.99
79.18
A
NaCHO2
46.14
19.63
CH2O2
6.28
3.95
H2O
47.58
76.42
A
NaCHO2
46.90
20.68
CH2O2
8.92
5.81
H2O
44.18
73.51
A + B
NaCHO2
45.38
20.42
CH2O2
12.76
8.48
H2O
41.86
71.10
B
NaCHO2
42.38
19.98
CH2O2
20.78
14.47
H2O
36.84
65.55
B
NaCHO2
41.19
20.38
CH2O2
26.58
19.43
H2O
32.23
60.19
B
NaCHO2
40.11
21.50
CH2O2
34.66
27.45
H2O
25.23
51.05
B
NaCHO2
39.10
22.02
CH2O2
39.77
33.08
H2O
21.13
44.90
B + C
NaCHO2
38.91
22.44
CH2O2
41.85
35.67
H2O
19.24
41.89
unst.
NaCHO2
35.30
21.68
CH2O2
50.80
46.10
H2O
13.90
32.22
C
NaCHO2
32.77
22.09
CH2O2
60.16
59.92
H2O
7.07
17.99
C
NaCHO2
31.37
22.47
CH2O2
65.66
69.50
H2O
2.97
8.03
C
Notes:
a
These values were calculated by the compiler.
b
The solid phases are: A = NaCHO
2
•2H
2
O; B = 3NaCHO
2
•CH
2
O
2
; C = NaCHO
2
•CH
2
O
2
.
Method/Apparatus/Procedure:
The isothermal method was used. The sodium formate content was determined gravimetrically as NaCl. Formic acid content was determined by titration with 5 N NaOH. The composition of the solid phases was determined by Schreinemakers method.
Source and Purity of Materials:
No information is given.
Estimated Errors:
Temperature: The termperature was controlled to within ± 0.1%.