Assertion: hydrogen fluoride | /r/HasProperty | evolved
Facets:
Source sentences:
text: 245 parts of potassium bisulfate (about 90% of theory) remaining in the vented vessel after the hydrogen fluoride is evolved, is recycled for use in the succeeding run as the potassium fluosilicate precipitant.
text: During this period, substantially all of the remaining potassium bifluoride is converted to hydrogen fluoride which is evolved.