Compilation - Ammonia with Phosphoric acid and Water (IUPAC SDS Volume 66)

SDS Volume (2944)

Volume 66. Ammonium Phosphates, p None

Original Measurements

Jänecke, E.; Z. Phys. Chem. 1936, 177A, 7.

Variables:

Composition and temperature

Prepared by:

J. Eysseltová

Method/Apparatus/Procedure:

The only information given is that a self-constructed apparatus was used.

Source and Purity of Materials:
  1. No information is given.
Estimated Errors:

Ambient temperature: No information is given. The compiler estimates the reproducibility of the temperature measurement to be about 2°C.

Components:
  1. Ammonia, $\ce{ NH3 }$; [7664-41-7] NIST WebBook
  2. Phosphoric acid, $\ce{ H3PO4 }$; [7664-38-2] NIST WebBook
  3. Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Part I. The temperature at which the last crystal disappeared in the NH3-H3PO4-H2O-system.
$T$ (°C) $T_{2}$ (°C) 100w1 100w2 100w4 m3 (mol/kg) m4 (mol/kg) Phase (s) ()
90 6.5035.058.5 10.917.1NH4H5(PO4)2
5048 5.903.091.1 115310NH4H5(PO4)2
185184 11.32.286.5 302401NH4H2PO4
126 8.5030.061.5 16.620.9NH4H2PO4
88 6.5030.063.5 12.721.6NH4H2PO4
93 11.035.054.0 18.515.7NH4H2PO4
85 8.5035.056.5 14.316.5NH4H2PO4
88 10.040.050.0 14.712.8NH4H2PO4
17.030.752.3 32.517.4(NH4)2HPO4
164 18.522.658.9 48.126.6(NH4)2HPO4
>180 16.418.465.2 52.336.2(NH4)2HPO4
110 15.030.055.0 29.418.7(NH4)2HPO4
100 12.530.057.5 24.519.6(NH4)2HPO4
72 13.535.051.5 22.615.0(NH4)2HPO4
58 13.241.845.0 18.511.0(NH4)2HPO4
53 12.540.047.5 18.312.1(NH4)2HPO4
185 22.619.258.2 69.130.9(NH4)3PO4K2H2
189185 21.522.356.2 56.625.7(NH4)3PO4K2H2
147144 18.532.648.9 33.315.3(NH4)3PO4K2H2
148148 18.736.645.0 30.212.6(NH4)3PO4K2H2
149 19.141.139.8 27.39.88(NH4)3PO4K2H2
124 16.740.942.4 24.010.6(NH4)3PO4K2H2
115114 19.358.921.8 19.23.78(NH4)3PO4K2H2
138 18.657.024.4 19.24.37(NH4)3PO4K2H2
121121 27.017.155.9 92.733.4(NH4)3PO4K2H2
117116 16.657.326.1 17.04.65(NH4)3PO4K2H2
125 16.551.432.1 18.86.37(NH4)3PO4K2H2
114113 15.352.532.2 17.16.26(NH4)3PO4K2H2
95 13.953.932.2 15.16.10(NH4)3PO4K2H2
101100 17.869.612.6 15.01.85(NH4)3PO4K2H2

(a) The meaning of t1 and t2 is not defined. The compiler's opinion is that these are the results of repeated measurements.

(b) These values were calculated by the compiler.

(a) These data were calculated by the compiler.

(b) The meaning of the terms is as follows: t1..The temperature at which one liquid phase was observed during heating. t2..The temperature at which the other liquid phase appeared. t3..The temperature at which the last crystal disappeared. t4..The temperature at which the first crystal appeared during cooling. R..approximate ratio of the amount of upper layer in that of the lower layer.

(c) Explosive.

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