Assertion: hydrogen fluoride's amount | /r/HasProperty | required for the equation
Facets:
value: preferably
type: DEGREE
Source sentences:
text: In practicing the process, an amount of calcium chloride is used which is less than the stoichiometric amount required for the equation Preferably, the amount used is such that the hydrogen fluoride is kept at a minimum content of at least 1% by Weight of the treated solution, thus ensuring substantial precipitation of all the calcium fluoride formed and freedom from calcium ions in the mother liquor leaving the crystallizer.