As bullet points, describe the key steps in preparing magnesium sulfate crystals from magnesium and sulfuric acid?

2017-01-11 1:07 am

回答 (1)

2017-01-11 1:18 am
W(1) Add excess magnesium ribbons to a solution of dilute sulfuric acid until no bubbles are observed. (This indicates that sulfuric acid completely reacts, and the solute now is only magnesium sulfate.

(2) Filter off the unreacted magnesium.

(3) Heat the solution and evaporate the solvent until a concentrated solution is obtained.

(4) Cool the solution slowly, and then crystals of magnesium sulfate are formed.

(5) Filter the mixture. Dry the residue with dry filter paper. The dried crystals obtained is magnesium sulfate crystals.


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