Assertion: gypsum's water | /r/HasProperty | required for reaction
Facets:
Source sentences:
text: , the relative amount of water required for reaction is determined by the ratio of the molar mass of the extra water (1·5 × 18·02) to the molar mass of the hemihydrates with which it will react, i.e. 27·03/145·15 = 0·186.
text: When the water needed for the reaction is used up and the reaction is virtually complete, the growth of gypsum crystals stops, even in its inhibited form.