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- W2003708907 abstract "Methods of preparation are given for phosphotungstic acid, 3H2O.P2O5.24WO3, as distinct from the sodium salt, 3Na2O.P2O3, 24WO3.NH2O. The acid has an approximate solubility in water at room temperature of 5 parts in 1 part of water and the sodium salt has a solubility of approximately 1 in 1 part of water. The acid requires 1·12 c.c. 2N-sodium hydroxide per g. to make it neutral to phenolphthalein whereas the latter requires 0·15 c.c. per g. The acid is a strong one and cannot be released from its sodium salt by hydrochloric or nitric acids, so that it must be prepared from barium phosphotungstate by use of sulphuric acid, taking advantage of the insolubility of barium sulphate. A preparation of barium phosphotungstate and of barium tungstate is included." @default.
- W2003708907 created "2016-06-24" @default.
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- W2003708907 date "1950-09-01" @default.
- W2003708907 modified "2023-09-27" @default.
- W2003708907 title "The preparation of phosphotungstic acid and of sodium and barium phosphotungstates" @default.
- W2003708907 doi "https://doi.org/10.1002/jctb.5000690906" @default.
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