Assertion: fertilizer's acid | /r/HasProperty | heated
Facets:
value: frequently
type: TEMPORAL
Source sentences:
text: The phosphoric acid produced by either the wet or dry process is frequently heated, driving off water and producing a superphosphoric acid.
text: When ammonia is added to phosphoric acid that hasn’t been heated, it produces monoammonium phosphate (11-52-0) or diammonium phosphate (18-46-0), depending on the ratio of the mixture.
text: If ordinary phosphoric acid is heated, water is removed and the orthophosphate ions combine to form a polyphosphate.