why does plaster of paris become useless after mixing water in it . Because it again forms gypsum after adding water so plaster of paris can be obtained by heating it according the following equation:-
caso4.1/2h2o +1.5h20 ->caso4.2h2o .
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yes u r correct .
I think
I think
Webby:
so what do you think ???
it should not become useless rgt ??
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