Q.20 Draw the electron dot structures for :
a) Ethanoic acid b) H2S
Write an equation to show the reaction between plaster of paris and water.
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Answer:
Plaster of Paris
CaSO
4
.
2
1
H
2
O
+
Water
2
3
H
2
O
⟶
Gypsum
CaSO
4
.2H
2
O
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