Assertion: phosphoric acid | /r/MadeOf | 1.59%
Facets:
value: by 1.93% by weight fluorine
type: OTHER
value: by weight sio
type: OTHER
Source sentences:
text: For example, when phosphoric acid obtained from calcined Morocco phosphate rock and containing 1.59% by weight SiO and 1.93% by weight fluorine was used, the purity of sodium silicofluoride obtained without the addition of sodium fluoride was only 94.2% and its aqueous solution was of a White-turbid color with a fine precipitate of silicic acid floating therein.