Assertion: precipitate | /r/HasProperty | ignited
Facets:
Source sentences:
text: After drying, the precipitate frequently has to be ignited, that is, heated to a dull or a bright red heat, either in the air or in a current of some gas such as hydrogen, carbon dioxide, coal gas, or oxygen.
text: This method of filtration is specially applicable when the precipitate is to be ignited.