Question

explain the labrotary method of preparation of acetone on the basis of the following (I) labelled diagram of the aparatus (ii) chemical equation​

Answer 1

Answer

In laboratory, acetone is prepared by dry distillation of anhydrous calcium acetate.

(CH 3 COO)2 Ca ΔCH3COCH 3 +CaCO 3

Method: 30-40 gm of calcium acetate mixed with equal amount of sodium acetate is heated in a glass retort fitted with a condenser and receiver. Acetone is collected in the receiver. The acetone so obtained is not pure. To purify this, it is shaken with saturated solution of sodium bisulphite then crystals of acetone sodium bisulphite salt separated out. The crystalis washed and heated with sodium carbonate and then dried over anhydrous CaCl

2

and then distilled at 56

o

C to get pure acetone.

solut