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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Diammonium hydrogenphosphate with Diammonium carbonate, Dipotassium hydrogenphosphate, Dipotassium carbonate and Water
Components:
(1) Diammonium carbonate; (NH4)2CO3; [506-87-6]
NIST Chemistry WebBook
for detail
(2) Diammonium hydrogenphosphate; (NH4)2HPO4; [7783-28-0]
NIST Chemistry WebBook
for detail
(3) Dipotassium carbonate; K2CO3; [584-08-7]
NIST Chemistry WebBook
for detail
(4) Dipotassium hydrogenphosphate; K2HPO4; [7758-11-4]
NIST Chemistry WebBook
for detail
(5) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Syromyatnikova, M.N.; Torocheshnikov, A.B.; Kuznetsova, Zh. Prikl. Kim (Leningrad) 52, 568 (1979).
Variables:
Concentration = Composition at 0 ºC, 10 ºC, 20 ºC and 30 ºC.
Prepared By:
J. Eysseltová
Experimental Remarks:
Remarks: The authors present the following equation: y = A + 0.11 x, where y = total plant nutrient, and x = the mass ratio K
2
O/N. The following values for the parameter, A, are given:
Experimental Data:
(Notes on the Nomenclature)
Parameter A
t/°C
Comment(s)
0
A = 26.11
10
A = 28.4
20
A = 30.48
30
A = 33.0
Method/Apparatus/Procedure:
The isothermal method was used with 3.5 hours allowed for equilibration. Both liquid and solid phases were analyzed. NH
4
+
was determined by a distillation method
1
P
2
O
5
by the citrate method
2
and potasssium gravimetrically as the tetraphenylborate. The solid phase was analyzed by the Schreinemaker's method.
Source and Purity of Materials:
No information is given.
Estimated Errors:
Solubility: No information is given.
Temperature: No information is given.
References:
1
I. N. Shokin, S. A. Krasheninikov,
et al
., Tekhnicheskiy Analiz i Kontrol'v Proizvodstve Neorganicheskikh Veshchestv, Izd. Vysshaya Shkola, Moscow (1968).
2
F. N. Kel'man, E. B. Bruckus, and R. F. Osherovich, Metody Analiza pri Kontrole Proizvodstva Sernoy Kisloty i Fosfornykh Udobreniy, Goskhimizdat, Moscow (1963).