Assertion: obtained phosphoric acid | /r/HasProperty | warmed
Facets:
Source sentences:
text: The obtained phosphoric acid was left standing for more than 12 hours, was then warmed so that such impurities present as calcium sulfate dissolved in the acid might not be deposited and was neutralized with sodium carbonate by varying the ratio of the sodium carbonate to the hydrofluosilicic acid contained in the acid.