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31/12/2021 3:14 pm
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Find the number of water molecules in gypsum, dead burnt plaster, and Plaster of Paris.
(a) 3, 0, 1
(b) 1, 0, 1
(c) 2, 0, 0.5
(d) 5, 0, 0.5
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31/12/2021 3:16 pm
Correct answer: (c) 2, 0, 0.5
Explanation:
Gypsum = CaSO4.2H2O
Plaster of Paris = CaSO4.1/2H2O
Dead burnt plaster = CaSO4