Alkali Metal Orthophosphates by J. Eysseltova, T. P. Dirkse

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By J. Eysseltova, T. P. Dirkse

This quantity provides and evaluates mentioned solubility information for the identify compounds, complementing an prior quantity within the IUPAC Solubility info sequence facing alkali steel halides. Orthophosphates were identified and used for a few years; vital functions comprise their use in fertilizers, as corrosion inhibitors and in piezoelectric parts. so much released info relate to sodium and potassium Read more...

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In&t. Obokck. Necvig. , Akad. Nauk SSSR 1955, 26, 248 4. ; Economy, G. , Jr. J . ElzctAockom. Soc. 1975, 122, 915. 5. M. J . Ckem. S o c , Valton Τηαηλ. 1977, 464. ; Schreiner, 0. Ckem. Z. kviOKQ. 1911, 75, 95-102. [7732-18-5] VARIABLES: PREPARED BY: One temperature: 25°C J. Eysseltova Composition EXPERIMENTAL VALUES: Solubility in the system: Na^PO^-NaOH - H P 0 - H 0 at 25°C. 3 Na. 19 solid,. 77 + Β Β metastable soln (continued next page) AUXILIARY METHOD/APPARATUS/PROCEDURE: SOURCE AND PURITY OF MATERIALS: Isothermal method.

The data were fitted to equation [1], suggested by Cohen-Adad (13). a n ln(x/x ) = A - U / T - l / T ) + Β·1η(Τ/Τ ) + C-(T-T ) ο ο ο ο [1] Α, Β and C are adjustable parameters. No attempt was made to give a physical meaning to them. The system is too complex for that, as is shown by reported activity coefficient data (14, 1 5 ) . is a reference mole fraction at temperature Τ . Its choice is arbitrary. The evaluators used the following two criteria for making their selection. 1. x was chosen as the mean value of the experimental data of more than one study.

33 11. 49 11. 61 10. 07 9. 86 8. 65 8. 04 7. 77 7. 12 6. 23 30. 32 6. 35 32. 29 7. 76 32. 90 7. 06 33. 43 7. 52 33. 53 7. 48 33. 60 7. 48 33. 69 7. 26 34. 52 8. 74 34. 67 8. 17 8. 78 8. 12 37. 52 9. 72 38. 20 9. 63 36. 76 8. 42 36. 21 8. 91 36. 31 36. 13 8. 72 36. 89 8. 45 37. 63 40. 29 9. 91 43. 02 10. 92 NaOH mass% temp = 60°C. 96 a mol/kg system. 5 DO. 5 DO. 5 DO. A. I Kid. Eng . Ckem. [7664-38- 2] 35 1952, 44, 1439-48. (3) Sodium hydroxide; NaOH; [1310-73- 2] (4) Water; H 2° , [7732-18-5] EXPERIMENTAL VALUES cont'd: Composition of saturated solutions of the Na O-P 0 -Η 0 system.

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