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plaster of paris

akcapr
in Inorganic Chemistry

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How could i make plaster of paris out of calcium sulfate (and no they arent exactly the same)? When i put calcium sulfate in water and dry its not hard at all. I heard you have to make it into gypsum or something.

Plaster of paris isnt just calcium sulfate. Its a mix of calcium sulfate, calcium carbonate, and "crystaline silica". refresh my mind, wats "silica" i know its a silicon compound though. is it just silicon dioxide?

ya, but ive just called it silicon dioxide for so long its like engrained in my brain (if thatg makes any sense).

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