pentoxiden.

Brit.

/pɛnˈtɒksʌɪd/, U.S.

/pɛnˈtɑkˌsaɪd/

Origin: Formed within English, by compounding. Etymons: penta- comb. form, oxide n.

Etymology: < penta- comb. form + oxide n.

Chemistry.

An oxide containing five atoms of oxygen in its molecule or empirical formula.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > oxygen > [noun] > compounds > oxides > by proportion of oxygen

tritoxide1806

oxidule1815

quadroxide1825

sesquioxide1831

pentoxide1851

tetroxide1866

trioxide1868

1851 C. R. Fresenius Man. Qualitative Chem. Anal. 28 If the hydriodic acid..has ceased to fume, it may be restored..by the addition of phosphoric pentoxide.

1881 Athenæum 24 Dec. 856/3 The author has prepared..a pentoxide of didymium.

1922 T. M. Lowry Inorg. Chem. xxxviii. 731 Vanadyl sesquisulphate..is formed by dissolving the pentoxide in strong sulphuric acid.

1955 K. Hutton & A. Swallow Chem. for Gen. Sci. iii. 36 The substances used..for drying gases, such as..phosphorus pentoxide and concentrated sulphuric acid, are all very hygroscopic.

1991 Process Engin. Aug. 21/1 Dinitrogen pentoxide can accomplish many nitrations faster and cleaner than existing systems.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	pentoxide
释义	pentoxiden. Brit. /pɛnˈtɒksʌɪd/, U.S. /pɛnˈtɑkˌsaɪd/ Origin: Formed within English, by compounding. Etymons: penta- comb. form, oxide n. Etymology: < penta- comb. form + oxide n. Chemistry. An oxide containing five atoms of oxygen in its molecule or empirical formula. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > oxygen > [noun] > compounds > oxides > by proportion of oxygen tritoxide1806 oxidule1815 quadroxide1825 sesquioxide1831 pentoxide1851 tetroxide1866 trioxide1868 1851 C. R. Fresenius Man. Qualitative Chem. Anal. 28 If the hydriodic acid..has ceased to fume, it may be restored..by the addition of phosphoric pentoxide. 1881 Athenæum 24 Dec. 856/3 The author has prepared..a pentoxide of didymium. 1922 T. M. Lowry Inorg. Chem. xxxviii. 731 Vanadyl sesquisulphate..is formed by dissolving the pentoxide in strong sulphuric acid. 1955 K. Hutton & A. Swallow Chem. for Gen. Sci. iii. 36 The substances used..for drying gases, such as..phosphorus pentoxide and concentrated sulphuric acid, are all very hygroscopic. 1991 Process Engin. Aug. 21/1 Dinitrogen pentoxide can accomplish many nitrations faster and cleaner than existing systems. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < n.1851
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