hetv. c~. acta 46,36.04 42.16 51.89 61.15 64.60 10.06 20.00 31.26 36.58 46.08 60.49 56.84 55.47 2.88...

80 Sodium Dihydrogenphosphate

COMPONENTS:(1) Sodium dihydrogenphosphate; NaH

2P0

4;

[7558-80-7](2) Potassium dihydrogenphosphate; KH

2P0

4;

[7778-70-0](3) Sodium chloride; NaC1; [7647-14-5](4) Potassium chloride; KC1; [7747-40-7](5) Water; H20; [7732-18-5)

ORIGINAL HEASUREMENTS:

Brunish1oz, G.; Bodmer, M.

Hetv. C~. Acta 1963, 46, 7, 289, 2575-86.

VARIABLES: PREPARED BY:

Temperature and composition. J. Eysse1tovll

EXPERIMENTAL VALUES:

H20 aconcn.

solid bphases

system.H2PO~-H20

C1-eq%

Na+llc1- ,

H+eq%

+Part 1. Solubility in the K ,

soln. K+no. eq%

temp. = O°C

"

"

"

"

(continued next page)""

ABC

"""""

A + C

C + D"

B + DB + C

"

A + B + CB + C + D

A + B

682.5598.7731.1738.4

11321016876.7589.1555.8492.3627.6660.4618.5

1241719.8

18071797162814671396132211831028

78.5862.1686.8088.0882.3681.3180.6454.4741.5725.4363.5274.2165.8088.6877 .4233.0532.9656.0046.8512.6069.4721. 9731.82

14.3125.258.777.96

11. 7312.4612.9530.3638.9349.6824.2817.2322.806.89

15.0444.6444.7629.3836.4858.2720.3652.0245.45

17.6510.4018.9319.0867.3352.2835.16

9.598.767.075.51

14.9211.3875.45

7.5450.2049.6060.5244.6429.1358.4526.0122.73

123456789

1011121314151617181920212223

AUXILIARY INFORMATION

HETHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS:

Nothing is stated, but it probably is thesame as in ref. (1).

Nothing is stated, but it probably is thesame as in ref. (1).

ESTIMATED ERROR:

No information is given.

REFERENCES:

1. Brunisho1z, G.; Bodmer, M. Hetv. C~.Acta 1963, 46, 288, 2566-74.

Sodium Dihydrogenphosphate 81

COMPONENTS:(1) Sodium dihydrogenphosphate; NaH2P04;[7558-80-7](2) Potassium dihydrogenphosphate;

KH2P04; [7778-70-0](3) Sodium chloride; NaC1; [7647-14-5](4) Potassium chloride; KC1; [7747-40-7](5) Water; H20; [7732-18-5]

ORIGINAL MEASUREMENTS:


Helv. C~. Acta 1963, 46, 7, 289, 2575-86.

EXPERIMENTAL VALUES cont'd:

Part 1. Solubility in the K+, Na+1 IC1-, H2PO~-H20 system.

soln. K+ H+ C1- H20 a soli~ ano. eq% eq% eq% concn. phases

temp ... OoC

242526272829

32.7119.4113.5415.1519.083.73

19.5938.8151.9530.3217.4438.51

70.6441. 7822.0654.5373.4342.49

957.9898.7747.5744.2730.6598.9

C11

11

11

11

D

temp ... 25°C

3031323334353637383940414243444546474849505152535455565758596061626364

24.606.38

28.2327.3126.5625.3575.8469.2950.7935.16

5.571.48

14.4510.39

6.3371.1858.4339.704.31

10.275.07

57.9057.2945.7635.7229.7333.8039.9126.6323.2719.8716.2812.17

6.392.76

16.7451.88

3.837.199.65

14.5212.8513.2813.7615.1258.9348.4828.9038.4951. 795.346.827.008.61

20.5540.4234.8424.7834.2242.4759.4531. 3021.7152.6746.5539.7532.5751.6359.0856.71

74.8922.2394.2689.2085.4578.2580.7380.0679.3077 .4211.6227.6756.6542.4722.5792.0289.8289.5587.0869.1839.4147.6862.8148.7136.4610.8253.2067.4421.0030.1840.4851.1522.4311.6214.89

606.1303.6725.3695.2673.3627.5926.9889.8800.4696.8258.7366.2523.5443.1308.0

1002896.0791.0794.0638.5443.4

11491015

987.7913.9881.5823.1806.1786.4713.0639.4564.3466.5283.7296.5

A + B + CB + C + D

A + B11

11

11

A + C11

11

11

C + DB + DB + C

11

11

A11

11

B11

11

C

temp ... 50 0 e6566676869707172

29.625.01

37.7633.6519.8412.81

6.155.10

21.3664.08o9.72

32.9545.6762.0364.00

68.073.86

10085.3450.7031.637.003.89

518.5131.9702.8621.1444.0336.0162.0133.2

A + B + eB + C + E

A + B11

B + C11

11

11

(continued next page)


COMPONENTS:(1) Sodium dihydrogenphosphate; NaH2P04;[7558-80-7)(2) Potassium dihydrogenphosphate;

KH 2P04 ; [7778-70-0)(3) Sodium chloride; NaC1; [7647-14-5)(4) Potassium chloride; KC1; [7747-40-7)(5) Water; H20; [7732-18-5)



Helv. Chlm. Acta 12&1, 46, 7, 289, 2575-86.


Part 1. Solubility in the K+, Na+\ !C1-, H2PO~-H20 system.

soln. K+ H+ C1- H20 Itno. eq% eq% eq% concn.

temp. a 75°C

solid bphases

7374757677787980818283848586878889

31.146.77

39.7069.7754.5625.7221.0814.97

9.746.80

61.3110.0015.6359.3938.7030.2428.42

29.7364.8510.8520.5123.0836.0442.1651.8961.1564.6010.0620.0031.2636.5846.0860.4956.84

55.472.88

83.7069.2465.4646.0436.7622.098.153.02

84.9070.0053.1145.3430.90

9.2714.74

402.2102.8556.5613.0534.6365.3317.9237.0149.8102.5649.7603.8457.8622.9503.7393.6381.9

A + B + CB + C + E

A + BA + C

"B + C

""""AB

"C"""

temp. a 100°C

90919293949596979899

100101

27.848.47

50.4144.5635.9824.0420.2015.1512.6512.10

9.298.70

43.1665.27o

11.8827.8548.0852.9359.2761.9962.7364.9165.11

35.402.10

10082.2258.3427.8820.5610.85

6.895.742.392.30

256.671.6

594.2418.6375.8223.5191. 7138.1115.5105.6

76.174.4

A + B + CB + C + E

A + B""

B + C""""""

ItThe concentration units are: mo1/100 eq% of solute.

bThe solid phaes are: A a KC1; B a NaC1; C a KH2P0

4; D = NaH

2P04 '2H2

0; E = NaH2P04•

Part 2. The compiler has calculated the following results from the data in Part 1.K+ Na+ C1- H2PO;; H2O

soln. mass% mol/kg mass% mol/kg mass% mol/kg mass% mol/kg mass%no.

temp. a OOC

1 3.83 1.44 8.68 5.53 15.46 6.38 3.84 0.58 68.182 2.53 0.96 9.19 5.97 13.70 5.75 7.60 1.17 66.983 3.88 1.44 8.72 5.49 16.14 6.58 2.23 0.33 69.024 3.88 1.44 8.73 5.49 16.25 6.61 2.00 0.30 69.145 9.78 3.30 1. 78 1.03 10.82 4.03 2.11 0.29 75.526 8.30 2.86 3.29 1.93 11.70 4.43 2.45 0.34 74.257 6.30 2.23 5.46 3.29 13.10 5.10 2.87 0.41 72.288 2.38 0.90 8.76 5.66 12.25 5.12 9.33 1.43 67.279 2.30 0.88 8.06 5.23 9.88 4.14 12.67 1.95 67.09

10 2.06 0.80 7.40 4.88 6.71 2.86 17.93 2.80 65.9111 1.30 0.49 9.75 6.22 13.60 5.61 7.12 1.08 68.2212 3.33 1.26 8.92 5.71 15.04 6.23 4.78 0.72 67.9413 2.69 1.02 9.15 5.91 14.11 5.90 6.69 1.02 67.3514 10.10 3.34 1.39 0.79 10.77 3.96 1.25 0.17 76.4915 1. 59 0.58 9.62 5.98 14.83 5.96 3.94 0.58 70.01



COMPONENTS: ORIGINAL MEASUREMENTS:(1) Sodium dihydrogenphosphate: NaH2

P04; Brunish1oz, G.; Bodmer, M.[7558-80-7](2) Potassium dihydrogenphosphate; He£v. CIWn. Acta. 1963, 46, 7, 289, 2575-86.

(3)KHl04; [7778-70-0]

[7647-14-5]Sodium chloride; NaC1;(4) Potassium chloride; KC1; [7747-40-7](5) Water: H

2O; [7732-18-5]


Part 2. The compiler has calculated the following results from the data in Part 1.K+ Na+ C1- H2PoL; H2Osoln.

no. mass% mol/kg mass% mol/kg mass% mol/kg mass% mol/kg mass%

temp. .. O°C

16 5.17 1.54 0.31 0.16 3.09 1.01 5.70 0.67 85.7217 5.14 1.53 0.34 0.17 3.10 1.02 5.74 0.69 85.6818 6.70 2.06 0.66 0.34 5.62 1.91 4.03 0.50 82.9919 5.46 1.69 1.36 0.71 5.20 1.77 5.38 0.67 82.6120 3.82 1.16 0.97 0.50 1.50 0.50 9.47 1.16 84.2421 7.61 2.46 1.62 0.89 8.20 2.91 3.29 0.43 79.2722 3.89 1.22 1.93 1.03 2.98 1.03 9.66 1.22 81.5323 3.79 1.23 3.12 1. 72 4.81 1.72 9.40 1.23 78.8824 5.54 1.90 4.75 2.77 10.86 4.09 4.11 0.57 74.7325 3.57 1.20 4.52 2.58 6.97 2.58 8.85 1.20 76.0926 2.93 1.01 4.39 2.56 4.33 1.64 13.94 1.93 74.4227 3.18 1.13 6.72 4.07 10.37 4.06 7.88 1.13 71.8428 3.96 1.45 7.72 4.80 13.84 5.57 4.57 0.67 69.9129 0.93 0.35 8.50 5.36 9.64 3.93 11.90 1.78 69.02

temp. = 25°C

30 5.76 2.25 8.08 5.38 15.91 6.85 4.86 0.77 65.3831 2.50 1.17 9.62 7.64 7.90 4.06 25.20 4.74 54.7732 5.73 2.16 8.11 5.20 17.36 7.20 0.96 0.15 67.8233 5.74 2.18 8.10 5.23 17.00 7.11 1.88 0.29 67.2834 5.73 2.19 8.09 5.26 16.72 7.03 2.60 0.40 66.8735 5.78 2.24 8.06 5.32 16.18 6.91 4.10 0.64 65.8736 12.68 4.54 1.11 0.68 12.24 4.83 2.66 0.38 71.3137 11.98 4.33 1. 77 1.09 12.56 4.98 2.85 0.41 70.8438 9.60 3.52 3.94 2.46 13.59 5.49 3.24 0.48 69.6439 7.42 2.80 6.17 3.96 14.81 6.16 3.94 0.60 67.6740 2.43 1.20 9.11 7.62 4.60 2.49 31.89 6.33 51.9741 0.52 0.22 10.35 7.59 8.82 4.19 21.03 3.66 59.2842 3.84 1.53 8.86 6.01 13.66 6.00 9.53 1.53 64.1043 3.14 1.30 9.09 6.41 11.65 5.31 14.39 2.40 61.7244 2.46 1.14 9.58 7.56 7.96 4.06 24.49 4.66 55.1145 11.19 3.95 2.17 1.30 13.11 5.09 1.04 0.15 72.4946 10.05 3.62 3.52 2.15 14.01 5.55 1.45 0.21 70.9747 7.56 2.79 5.97 3.74 15.47 6.27 1.64 0.24 69.3648 0.84 0.30 10.03 6.09 15.46 6.08 2.09 0.30 71.5749 2.37 0.89 9.39 6.02 14.48 6.00 5.88 0.89 67.8850 1.55 0.64 9.80 6.83 10.93 4.92 15.32 2.53 62.4151 8.54 2.80 0.63 0.35 6.38 2.30 6.38 0.84 78.0652 9.20 3.14 1.69 0.98 9.14 3.43 4.94 0.68 75.0253 7.64 2.57 1.96 1.13 7.38 2.73 7.08 0.96 75.9354 6.44 2.17 2.31 1.32 5.96 2.21 9.47 1.29 75.8255 5.66 1.87 1.21 0.68 1.87 0.68 14.03 1.87 77.2256 6.50 2.28 3.94 2.36 9.27 3.58 7.44 1.05 72.8457 7.65 2.75 4.33 2.64 11. 72 4.64 5.16 0.75 71.1458 5.49 1.88 2.51 1.46 3.92 1.48 13.46 1.86 74.6159 5.12 1.81 3.91 2.35 6.02 2.34 12.71 1.81 72.2460 4.69 1. 73 5.60 3.51 8.66 3.51 11.61 1.72 69.4461 4.14 1.60 7.65 5.04 11.80 5.02 10.28 1.60 66.1162 3.66 1.45 6.40 4.31 6.11 2.66 19.28 3.08 64.5563 2.65 1.25 8.43 6.77 4.37 2.27 30.34 5.77 54.2164 1.12 0.52 9.65 7.59 5.47 2.78 28.50 5.32 55.27

temp D 50°C

65 7.69 3.17 7.48 5.25 16.02 7.28 6.85 1.14 61.9666 3.00 2.11 10.89 13.02 2.10 1.62 47.63 13.50 36.3867 7.73 2.98 7.49 4.92 18.56 7.88 0 0 66.2268 7.61 3.01 7.53 5.06 17.49 7.61 2.74 0.44 64.6369 5.86 2.48 8.19 5.91 13.57 6.33 12.04 2.06 60.34




KH2P04; [7778-70-0](3) Sodium chloride; NaC1; [7647-14-5](4) Potassium chloride; KC1; [7747-40-7](5) Water; H20; [7732-18-5]



Helv. C~. Acta 1963, 46, 7, 289, 2575-86.


soln.no.

Part 2. The compiler has calculated the following results from the data in Part 1.

K+ Na+ C1- H2PC4 H20

mass% mol/kg mass% mol/kg mass% mol/kg mass% mol/kg mass%

temp ... 50°C

707172

4.623.373.04

2.122.112.13

8.8110.2410.84

6.8610.9112.89

10.353.472.10

5.222.391.62

20.4042.1047.42

3.7710.6313.36

55.8240.8236.59

7374757677787980818283848586878889

9.544.409.58

15.6513.58

8.507.676.565.444.42

13.142.404.54

13.6610.6110.07

9.58

4.303.663.966.325.673.913.683.513.613.685.240.921.905.304.274.274.13

7.0510.86

7.021.283.277.437.878.549.55

10.953.619.869.060.542.451.812.92

5.4015.34

4.940.882.325.826.427.77

10.8015.50

2.456.446.440.361.681.312.14

15.411. 70

18.3214.0814.7813.7912.148.784.121. 78

16.5015.2113.98

9.467.682.804.50

7.641.558.336.266.796.986.415.163.011. 637.246.426.434.033.401.302.14

11.2852.25

3.255.707.11

14.7419.0428.2542.3952.16

2.685.94

11.2510.3915.6724.9823.76

2.0517.50

0.540.931.202.743.686.09

11.3517.52

0.430.921.901.632.544.274.13

56.7230.7861.8363.2961.2655.5553.2847.8538.4930.6964.0966.5961.1765.9563.5860.3359.24

90919293949596979899

100101

11.206.06

11.3612.6511.3310.539.688.547.717.636.526.16

6.036.574.715.915.325.985.856.096.086.366.786.50

6.8611.05

6.577.276.707.187.578.489.099.33

10.6610.90

6.2820.38

4.645.785.356.937.79

10.2912.2013.2418.8319.56

12.921.36

20.4321.1716.6611.08

8.945.553.813.281.521.48

7.641.629.32

10.888.606.915.944.353.303.011. 741.71

21.4957.94o4.18

10.8526.1331.4941.5746.9649.1356.6957.21

4.6625.32o0.792.055.987.67

11. 9514.9316.5323.7524.32

47.5323.5961.6454.7254.4745.0842.3135.8532.4230.6424.6024.25

Part 3. The points of simultaneous crystallization of NaC1 + KH2

P04

+ NaH2

P04

·xH20.

soln.no. +eq% H eq% C1- x

2222211oo

2~lbHOC

598.7475.0303.6239.0186.3163.1145.7131.9102.871.6

177.5133.9

62.1644.9322.2314.008.335.994.753.862.882.107.203.91

25.2536.7751.8857.3361.1662.6063.5964.0864.8565.2761.8664.06

eq% of solute.

the solid phases being NaC1+KH2P0

4+NaH

2P0

4·2H

20+NaH

2P0

4·H

20.

the solid phases being NaC1+KH2P04+NaH,PO&·2H,O+NaH,PO&.

102 0 10.40103 12.5 8.52104 25 6.38105 30 5.47106 35 4.98107 40 4.85108 45 5.00109 50 5.01110 75 6.77III 100 8.47112 36.0 4.90113 48.2 4.90

aThe concentration unit is mo1/100bAn invariant point,

CAn invariant point,



KH2P04; [7778-70-0](3) Sodium chloride; NaCl; [7647-14-5](4) Potassium chloride; KC1; [7747-40-7](5) Water; H20; [7732-18-5]



Brunishloz, G.; Bodmer, M.

Helv. C~. Acta 1963, 46, 7, 289, 2575-86.

~2P04mass% mol/kg

Part 4. The compiler has calculated the following values from the data in Part 3.K+ Na+ Cl-

soln.no. mass% mol/kg mass% mol/kg mass% mol/kg

102103104105106107108109110111112113

2.552.462.502.472.572.662.883.004.406.062.592.92

0.961.001.171.271.491.651.912.113.666.571.532.03

9.199.319.629.89

10.2610.5010.6410.8910.8611.0510.3210.88

5.976.407.648.65

10.1011.0911.9813.0215.3420.3810.4012.88

13.7011. 79

7.905.743.892.982.482.101. 701.363.452.11

5.755.244.063.252.482.041.811.621.551.622.251.62

7.6013.1825.2032.1539.0742.6645.3747.6352.2557.9440.5147.35

1.172.154.746.669.11

10.6712.1113.5017 .5025.329.68

13.29

66.9863.2654.7749.7444.2041.2038.6336.3830.7823.5943.1436.74


COMPONENTS:(1) Sodium dihydrogenphosphate; NaH2P04 ;[7558-80-7]

(2) Ammonium dihydrogenphosphate; NH4H2P04;[7722-76-1]

(3) Diammonium hydrogenphosphate; (NH4)2HP04[7783-28-0]

(4) Water' H~O' 17732-18-5]

ORIGINAL MEASUREMENTS:Babenko, A.M.; Vorob'eva, T.A.

Zh. P~kl. K~. 1976, 49, 1502-6.

VARIABLES: PREPARED BY:Temperature and concentration of NaH2P04in a mixture containing a mol ratio ofNH4H,P0t../(NH4)2HP04 = 1.


J. Eysseltov5:'

Part 1. Points of simultaneous crystallization of two or three solid phases in theNH4H2P04-(NH4)2HP04-NaIl2P04-1120 system.

mixturea NH4H2P04 (NII4)2I1P04 NaHl04b b b b tPc

solid c.mass% mol/kg mass% mass% mass% mol/kg phases

38.6 2.54 17.97 20.63 0.00 0.00 -8.6 A + C32.0 2.11 14.90 17.10 6.8 0.92 -8.4 A + C20.4 1.29 9.50 10.90 15.92 2.08 -8.4 A + C9.8 0.63 4.56 5.24 27.06 3.57 -9.4 A + C

21.25 1.35 9.89 11.36 15.0 1.96 -8.0 A + C16.0 1.01 7.45 8.55 20.0 2.60 -9.0 A + C

6.8 0.45 3.16 3.63 32.0 4.36 -11.0 A + C6.0 0.43 2.79 3.21 37.6 5.55 +0.5 A + B + C0.0 0.00 0.0 0.0 33.5 4.20 -8.8 A + B2.4 0.17 1.12 1.28 40.0 5.79 -12.0 A + B8.0 0.64 3.72 4.28 41.4 6.82 19.2 B + C8.0 0.70 3.72 4.28 46.0 8.33 25.2 B + C9.8 0.96 4.56 5.24 48.708 9.78 35.0 B + C + D

61.0 6.33 28.40 32.60 0.0 0.0 39.0 C + D56.0 5.72 26.07 29.93 4.4 0.92 45.6 C + D48.0 4.67 22.34 25.65 10.4 2.08 48.3 C + D36.0 3.25 16.76 19.24 19.2 3.57 44.6 C + D28.0 2.62 13.04 14.96 28.8 5.55 50.3 C + D



METHOD/APPARATUS/PROCEDURE:

An improved poly thermic method (1) was used.

SOURCE AND PURITY OF MATERIALS:Reagent grade salts were recrystallized anddried before use. The ammonium salts weredried at 40-50°C. The sodium salt wasdried at 105°C. The material designated"mixture" was prepared by mixing equimo1aramounts of NH4112P04 and (NH4)2HP04 andhomogenizing them by grinding in a mortar.

ESTIMATED ERROR:


REFERENCES:

1. Erajzer, L.N.; Kaganskii, I.M., Zavod.Lab. 1967, I, 119.


PRIGINAL MEASUREMENTS:Babenko, A.M.; Vorob'eva, T.A.

Zh. P~kl. K~. 1976, 49, 1502-6.

solid c.phases;t/oC

three solid phases in the

mass%

NH4H/04mass%bbmol/kg

Points of simultaneous crystallization of two orNH4H2P04-(NH4)2HP04-NaH2P04-H20 system.

mixturea

mass%

COMPONENTS:(1) Sodium dihydrogenphosphate, NaH2P04;[7558-80-7](2) Ammonium dihydrogenphosphate; NH

4H

2P04;[7722-76-1)

(3) Daimmonium hydrogenphosphate; (NH4)2HP04;[7783-28-0)

(4) Water, H20; [7732-18-5)


Part 1.

24.020.020.00.01.84.758.08.08.90.01.64.2

11.25

2.272.022.200.00.170.450.820.881.010.00.170.451.35

11.179.319.310.00.842.213.723.724.140.00.741.965.24

12.8310.6910.690.00.962.544.284.284.760.00.862.246.01

33.240.043.256.055.052.552.4455.255.560.860.058.055.0

6.468.339.78

10.6010.6110.2311.0412.5012.9912.9213.0212.7813.58

56.055.067.040.243.546.042.050.54957.259.863.568.4

C + DC + DC + DB + EB + EB + ED + ED + E

D + E + FE + FE + FE + FE + F

Part 2. Solubility isotherms in

mass%bmol/kg

the NH4H/04-(NH4)211P04-NaH2P04-1I20 system.

(NH4)2HP04 Na1l2p04 H20 (N + P205)b bmass% mass% mol/kg mass% mass%

temp. a -5°C

0.06.7

12.02.392

22.033.440.2

0.00.450.790.171.432.252.72

0.03.125.591.11

10.2415.5518.71

0.03.586.411.28

11. 7617.8521.48

35.433.026.440.215.6

6.660.0

4.564.563.575.832.080.920.0

64.660.361.657.40862.459.9459.8

21.024.524.525.525.628.7829.9

temp. a O°C

0.014.0

6.582.38

24.433.642.6

0.00.940.450.171.632.283.00

0.06.513.061.11

11.3615.6419.83

0.07.483.521. 27

13.0417.9622.77

37.625.834.241.8715.126.640.0

5.023.574.816.262.080.920.0

62.460.259.2255.8760.4859.7657.4

22.125.526.226.427.128.9831.6

temp ... 10°C

0.06.38

19.029.02.28

40.047.0

0.00.451.362.06 i0.173.003.59

0.02.978.85

13.501.06

18.6221.88

0.03.41

10.1515.501.22

21.3825.12

42.236.224.314.1844.8

6.00.0

6.085.253.572.087.050.920.0

57.857.4256.756.7252.99254.053.0

25.026.2428.6329.928.2933.3635.0

alMixture" is an equimo1ar mixture of NH4H2P04 and (N1I4) 211P04'

bThese values were calculated by the compiler.

C.The solid phases are: A" ice; B a NaH2P04 '2H20; C a NH4H2P04; D a (NH4)211P04'

E .. NaH2

P04

'H20; F .. NaH2P04 •


COMPONENTS:(1) Sodium dihydrogenphosphate. NaH2Po4•[7558-80-7](2) Potassium dihydrogenphosphate. KH

2P04•[7778-77-0]

(3) Sodium chloride, NaC1. [7647-14-5](4) Potassium chloride. KC1. [7747-40-7](5) Water. H20. [7732-18-5]

VARIABLES:

Composition at 40·C.


Kha11ieva, Sh.D.

lzv. Akad. Nauk TuAm». SSR, Sen. F~z.-Tekh.,K~. Geo!. Nauk 1977, 3,125-8.

PREPARED BY:

J. Eysseltov'


Part 1. Solubility in + K+llc1-, IIlO~-1I20 system at 40·C.the Na ,

Janecke's indicesa

soln.Na+ K+

solid bC1- H2PO~ 1120no. phase

1 64.75 35.25 100 ----- 752.69 A + B2 64.85 35.15 96.20 3.80 725.80 "3 64.80 35.20 93.08 6.92 697.90 "4 65.06 34.94 90.78 9.22 696.95 "5 65.58 34.42 89.82 10.18 694.38 "6 66.30 33.70 88.93 11.07 680.58 "7 66.27 33.73 88.68 11.32 660.76 "8 68.31 31.69 87.57 12.43 657.31 "9 68.40 31.60 87.55 12.45 633.20 A + B + C

10 ----- 100 92.42 7.55 990.59 B + 011 16.72 83.28 91.84 8.16 860.17 "12 26.80 73.20 90.95 9.05 853.50 "13 43.45 56.55 89.83 10.17 766.98 "14 56.15 43.85 89.16 10.84 762.84 "15 63.94 36.05 88.19 11.81 716.00 "16 83.92 16.08 ----- 100 449.24 C + 017 84.43 15.57 5.93 94.07 441.34 "18 84.01 15.99 15.52 84.48 394.02 "19 84.38 15.62 23.46 76.54 446.46 "20 83.87 16.13 30.41 69.59 484.40 "21 83.83 16.17 34.66 65.34 465.75 "22 83.62 16.38 43.12 56.88 595.07 "



METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS:

The standard isothermal method was used. No information is given.The mixtures were stirred until the liquidphase had a constant composition. Thechloride ion content was determinedargentimetrica11y, potassium was determinedas potassium tetrapheny1borate, phosphoruswas determined by differential colorimetryon an FEK-56 apparatus, and sodium wasdetermined by difference.

ESTIMATED ERROR:


REFERENCES:


COMPONENTS:(1) Sodium dihydrogenphosphate; NaH

2P04 ;[7558-80-7)

(2) Potassium dihydrogenphosphate; KH2

P04

;[7778-77-0)

(3) Sodium chloride; NaC1; [7647-14-5)(4) Potassium chloride; KC1; [7747-40-7)(5) Water; H20; [7732-18-5)

ORIGINAL MEASUREMENTS:Kha11ieva, Sh.D.

I zv. Aka.d. Na.uk Twdzm. SSR, SeJL. F.i.z. -Teklt.,Kh.i.m. Geot. Na.uk 1977, 3, 125-8.


Part 1. Solubility in the Na+, K+j IC1-, H2PO~-H20 system at 40°C.

JUnecke's indicesa.soln.no.

2324252627

83.2882.4280.0374.8570.02

16.7217.5819.9725.1529.98

47.7856.3269.5479.2883.72

H2PO~

52.2243.6830.4820.7216.28

H20

578.00629.80624.76640.42662.04

solidbphase

C + D""

"

mol/kg

The compiler has calculated the following results from the data in Part 1.

Na+ K+ C1- 112PO~

mass% mol/kg mass% mol/kg mass% mol/kg mass%soln.no.

a.The units are: mo1/100 mol of solute.

bThe solid phases are: A a NaC1; B '" KC1; C a NaH

2P04 '1I2

0; D '" KlIl04

'

Part 2.

123456789

101112131415161718192021222324252627

7.447.557.677.657.717.888.028.288.480.001.662.684.716.167.289.529.82

10.5310.3210.0610.43

9.479.719.419.549.038.36

4.784.965.165.195.255.415.575.776.000.001.081. 743.154.094.96

10.3810.6311.8510.50

9.5610.00

7.818.007.277.126.495.88

6.906.987.087.006.896.826.956.546.68

15.1914.06.12.4810.448.197.583.113.093.423.253.323.433.163.323.424.065.176.10

2.602.692.802.782.752.752.842.682.775.615.384.764.103.193.031.991.962.251.941.851.931. 531.611.551. 782.182.52

17.7617.3117.0216.5016.3216.3316.5816.4016.7812.7314.0614.0615.0415.1015.52

0.001.063.014.435.676.667.558.619.93

12.8014.771~.44'

7.387.367.417.247.197.267.467.407.685.185.935.926.516.496.840.000.752.192.923.494.134.024.594.976.186.887.03

0.001.853.434.545.015.505.736.306.462.823.383.794.614.975.63

47.4345.7744.3039.1635.1234.0126.9525.4820.8615.2010.458.13

0.000.290.550.730.810.900.951.051.090.420.530.590.740.790.92

12.3711.8411.919.527.987.795.315.023.852.711.801.37

67.8866.3164.7864.3164.0663.4662.7262.4861.6069.2766.8466.9965.2065.5963.9839.9640.2638.7442.8345.8445.4652.8752.8856.3858.4060.58'61.98


COMPONENTS:(1) Sodium dihydrogenphosphate; NaH2P04 ;[7558-80-7](2) Sodium chloride; NaCl; [7647-14-5](3) Ammonium dihydrogenphosphate; NH

4H

2P04 ;[7722-76-1]

(4) Ammonium chloride; NH4Cl; [12125-02-9](5) Water; H20; [7732-18-5]

ORIGINAL MEASUREMENTS:Solov'ev, A.P.; Balashova, E.F.;

Verendyakina, N.A.; Zjuzina, L.F.

R~p. Sb. NauQh. T~.-Y~06!aV. G06. Pedagog,In.-t. 1978, 169, 79-84.


Composition at 25°C. J. Eysse1tov~

in the Na+, NH:I IC1-, H2P04-H20 system at 25°C.+ -NH4H2P04 b NH4C1 b Na H2P04 solidamass% mol/kg mass% mol/kg ion%C ion%C phase

---- ---- ---- ---- 100.0 44.63 A + B4.55 0.70 ---- ---- 91.75 50.72 "8.59 1.35 ---- ---- 84.69 54.90 II

12.40 2.06 ---- ---- 78.31 62.25 A + B + C11.93 2.35 ---- ---- 77.68 100.0 B + C13.11 2.59 ---- ---- 77.6984.72 II12.79 2.40 ---- ---- 78.74 73.75 II12.78 2.35 ---- ---- 78.86 69.71 II12.58 1.88 ---- ---- 78.20 42.40 A + C17.10 2.40 ---- ---- 70.77 29.23 II

5.64 0.75 12.93 3.70 48.58 8.66 A + C + D2.82 0.37 13.88 3.92 50.69 4.34 A + D

---- ---- 16.14 4.52 49.24 II4.48 0.57 18.75 5.15 27.55 7.26 C + D5 . .L5 0.66 21.11 5.82 !8.b7 8.32 II5.60 0.70 22.91 6.13 5.36 9.72 II6.12 0.78 25.54 6.98 ---- 10.17 II

1. 762.963.374.965.754.214.414.402.181.4130.39

NaClbmass% mol/kg

4.334.214.003.60

15.1313.9712.9011.01

4.548.009.33

16.8720.8516.0717.0717.158.685.891.59

NaH2p0

4 bmass% mol/kg

25.01 3.4824.74 3.6323.26 3.5124.19 3.8543.47 8.1238.32 7.2532.90 5.2030.54 5.3712.30 1.78

EXPERIMENTAL VALUES:Solubility

aTne solid phusetl arl;l: A .. NaCl; B .. NaHl04 '2112°; C .. NH

411l0

4; D .. NII

4C1.

bThe mol/kg H20 values were calculated by the compiler.

CThe units here are: mol/~OO mol of solute (compiler).


HETHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS:

The method of invariant points was used. A No information is given.third component was added to eutecticsystems until a new solid phase appeared.At equilibrium both liquid and solid phaseswere analyzed. Chloride ion content wasdetermined by the Vo1hard method. 112P04ions were precipitated as N1I4MgP04'6H20,and the excess of Mg was titrated comp1ex-ometrical1y (1). Ammonium ions were remove,and the excess of base used was titratedwith IIC1.

ESTIMATED ERROR:


REFERENCES:

1. Shemyakin, F.M.; Ze1enina, E.N.,Zavad. Lab. ~, 6.


COMPONENTS:(1) Sodium dihydrogenphosphate; NaH2P04;[7558-80-7](2) Potassium dihydrogenphosphate; KH

2P04;[7778-77-0]

(3) Sodium chloride; NaCl; [7647-14-6](4) Potassium chloride; KC1; [7747-40-7](5) Water; H20; [7732-18-5]

VARIABLES:

Composition at 25°C.

ORIGINAL MEASUREMENTS:Solov'ev, A.P.; Balashova, E.F.;

Verendjakina, N.A.; Zjzina, L.F.

R~p. Sb. Nauchn. T~.-YaAo6lov. G06.Pedagog. In-t. 1978, 769, 79-84.

PREPARED BY:

J. Eysseltova


Solubility in the K+, Na+IIC1- , HlO;;-H2Osystem at 25°C.

NaCl' NaHl04 KCl KHl04 K+ HlO~

mllss% mol/kg(t mass% mol/kga mass% mol/kga mass% mol/kga b ion%b

solidcion% phase

15.13 4.33 25.01 3.48 ---- ---- ---- ---- ---- 44.63 A + B13.74 4.31 27.72 4.23 ---- ---- 4.01 0.54 5.95 52.58 "12.85 4.47 30.72 5.20 ---- ---- 7.22 1.08 10.04 58.46 A + B + C---- ---- 46.65 8.71 ---- ---- 9.14 1.51 14.79 100.0 B + C

5.93 2.21 39.75 7.21 ---- ---- 8.37 1.34 12.45 79.48 "17.73 5.01 11. 57 1. 56 ---- ---- 10.18 1.23 15.78 36.11 A + C21.11 5.64 ---- ---- 4.16 0.87 10.70 1.23 27.22 15.93 "18.62 4.75 ---- ---- 8.69 1. 74 5.62 0.62 33.15 8.68 A + C + D19.49 4.86 ---- ---- 8.23 1.61 3.67 0.39 29.38 5.96 A + D20.90 5.22 ---- ---- 10.58 2.07 ---- ---- 28.44 ---- "14.75 3.67 ---- ---- 11.00 2.14 5.22 0.56 42.46 8.76 C + D

7.78 1.87 ---- ---- 16.85 3.18 4.34 0.49 65.96 8.15 "---- ---- ---- ---- 23.50 4.28 2.90 0.29 100.0 6.33 "a

The mol/kg 1120 values were calculated by the compiler.

bThe authors' ion% values are to be understood as mol/100 mol solute.

cThe solid phases are: A = NaCl; B = NaH2

P04

'2H20; C = KH

2P0

4; D = KC1.


METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS:

The method of invariant points was used. A No information is given.third component was added to eutecticsystems until a new solid appeared. Thesolid and liquid phases were each analyzed.Chloride ion content was determined by theVolhard method. H2P04- ions were pre-cipitated as NH4MgP04' 6112°. the excess ofMg2+ being titrated compleximetrically (1).NH! ions were removed and the excess ofbase used was titrated with 0.1 M HC1.

ESTIMATED ERROR:


REFERENCES:

1. Shemjakin, F.M.; Zelenina, E.N.Zavod. Lab. 1969, 6.


COMPONENTS:(1) Sodium dihydrogenphosphate; NaHZP04 ;[7558-80-7](2) Potassium dihydrogenphosphate; KH 2P04;[7778-70-0](3) Sodium nitrate; NaN03; [7631-99-4](4) Potassium nitrate; KN03; [7757-79-1](5) Water; H20; [7732-18-5]

ORIGINAL MEASUREMENTS:Girich, T.E.; Guljamov, Yu.M.

VopJt. KIUin. KlWn. Tekhnol. 1979, 57, 54-7.


Composition and temperature. J. Eysseltova


Composition of saturated solutions in the + +11- H2PO~-H20K ,Na N03 , system.K+ NO; H2O solid b

soln. no. ion% ion% acone. phasestemp. = 323 K

1 91.54 89.68 633.0 A + C2 81.09 90.22 534.2 "3 67.25 90.20 458.7 "4 61.59 90.47 437.2 "5 56.26 90.87 390.7 "6 52.33 90.87 285.5 "7 47.09 92.09 285.5 "8 42.68 92.44 260.3 "9 40.89 93.02 244.5 "

10 39.25 92.14 217.1 "11 37.10 93.42 192.9 A + B + C12 38.95 100.0 208.2 A+ B13 37.98 98.25 193.8 "14 37.81 95.99 193.0 "15 16.57 0.00 365.9 C + E16 14.29 18.01 283.0 "17 13.88 27.98 292.4 "18 14.93 37.85 280.3 "19 16.88 42.92 276.1 B + C + E20 16.99 47.60 245.9 B + C21 20.66 59.33 238.0 "22 25.22 76.45 219.8 "23 33.67 90.92 208.2 " (continued next page)


METHOD/APPARATUS/PROCEDURE:The isothermal method was used. Equilibriumwas ascertained by repeated analysis of thesolid and liquid phases. The dihydrogen-phosphate ion content was determinedphotoco1orimetrica1ly, the sodium andpotassium ion content was determined byflame photometry, and the nitrate ion contenwas determined by a titration with FeS04 •

SOURCE AND PURITY OF MATERIALS:The solids were chemically pure and wererecrystallized twice before being used.

ESTIMATED ERROR:

No details are given.

REFERENCES:

hetv. c~. acta 46,36.04 42.16 51.89 61.15 64.60 10.06 20.00 31.26 36.58 46.08 60.49 56.84 55.47 2.88...

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