Asked by Agatha
Describe how a pure dry sample of pure calcium sulfate can be prepared from sodium sulfate as one of the reagents
Answers
Answered by
DrBob222
Dissolve Na2SO4 in water, add Ca(OH)2 to get
Na2SO4(aq) + Ca(OH)2(aq) ==> CaSO4(s) + 2NaOH(aq)
Filter to isolate the CaSO4 solid (it will be in the form of CaSO4.2H2O) and wash thoroughly to remove the NaOH.
Dry the CaSO4.2H2O in an oven and place in a furnace @ 340 C to remove the water and form anhydrous CaSO4.
Na2SO4(aq) + Ca(OH)2(aq) ==> CaSO4(s) + 2NaOH(aq)
Filter to isolate the CaSO4 solid (it will be in the form of CaSO4.2H2O) and wash thoroughly to remove the NaOH.
Dry the CaSO4.2H2O in an oven and place in a furnace @ 340 C to remove the water and form anhydrous CaSO4.
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