pentoxide

[ pen-tok-sahyd ]

/ pɛnˈtɒk saɪd /

an oxide containing five atoms of oxygen, as phosphorus pentoxide, P2O5.

Origin of pentoxide

1860–65; pent- + oxide

It burns when heated in air, forming the pentoxide and sulphur dioxide.

Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 |Various
Columbium pentafluoride, CbF5, is obtained when the pentoxide is dissolved in hydrofluoric acid.

Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 |Various
The oxyfluoride, CbOF3, results when a mixture of the pentoxide and fluorspar is heated in a current of hydrochloric acid.

Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 |Various
It is only known in solution; evaporation of the solution yields the pentoxide.

Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 |Various

It burns readily in air, and is converted into the pentoxide when fused with acid potassium sulphate.

Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 |Various

pentoxide

/ (pɛntˈɒksaɪd) /

an oxide of an element with five atoms of oxygen per molecule