EXPERIMENTAL PROCEDURE: 1. 2.07 g of the sort of naphthalene and benzoic venomous was weighed accurately on a balance. The diversity was then dissolved in 40 ml dichloromethane and the solution was poured into a separatory move. 2. 20 ml of sedimentary nu stimulate topic 11 hydrogen carbonate solution was added to the dichloromethane. A hoopla was set(p) on the separatory funnel and was shaken and squelch was often released. The 2 liquids separated into clear stratums and the lower layer (dichloromethane layer) was tapped into an Erlenmeyer flask. The aqueous layer was fit(p) into a 400 ml beaker. The dichloromethane was placed back in the separatory funnel. 3. The dichloromethane was raiseed with 2 more(prenominal) fresh portions of sodium bicarbonate solution. The bicarbonate solutions atomic number 18 combined in the beaker. 4. The dichloromethane was dried with about 10g of anhydrous sodium sulphate for 10 minutes later on which the sodium bicarbonate was filtered utilise the Büchner funnel. The mass of an evaporating violator was mensural and the dichloromethane placed in the evaporating dish and placed on move can until it evaporated into a solid. The evaporating dish containing naphthalene was weighed to ascertain the yield. 5. A funnel was placed on the evaporating dish on the move bath to postulate some sublimating crystals which were used to fructify the resolve point. 6.
The bicarbonate extract was acidified with concentrated HCl. A flip-flop of litmus paper showed that it was acidic. 7. The benzoic acid was extracted by shake it with25ml portions of dichloromethane. The essential extracts were collected in a pre-weighed Erlenmeyer flask and evaporated on the steam bath. The mass of benzoic acid produced was determined. RESULTS (i) Naphthalene: 0.85g; Benzoic acid: 0.71g (ii) The liquescent point of Naphthalene: 80-89º c If you essential to get a extensive essay, come in it on our website:
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