pentoxide

[ pen-tok-sahyd ]

/ pɛnˈtɒk saɪd /

noun Chemistry.

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

Nearby words

Origin of pentoxide

1860–65; pent- + oxide

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pentoxide

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

British Dictionary definitions for pentoxide

pentoxide

/ (pɛntˈɒksaɪd) /

noun

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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012