Assertion: sodium fluoride | /r/CreatedBy | forming fluoboric acid
Facets:
value: from fluosilicic acid
type: OTHER
Source sentences:
text: Sodium fluoride relatively low in silica has been made from fluosilicic acid by first forming fluoboric acid and then reacting this fluo'boric acid with sodium carbonate, sodium bicarbonate or sodium hydroxide to form sodium fluoride and recovering the boric acid as the sodium salt (U.S. 2,692,186).