Question 161 · LDEK · Prosthodontic materials
Gypsum is:
- A. calcium sulfate.
- B. sodium carbonate.
- C. sodium citrate.
- D. calcium carbonate.
- E. mixture of carbon dioxide and calcium hydroxide.
Hint
Recall the chemistry of plaster of Paris: a hemihydrate that takes up water and sets back into the dihydrate.
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