EXPERIMENT ( 3 ) Topic :The expression of Phenyl Benzoate from benzoyl chloride Introduction :The zeal of phenyl benzoate (ester) from phenol and benzoyl chloride is an esterification. In this experiment, you are requested to prepare and rarefy phenyl benzoate by some techniques. Chemicals :Phenol, Benzoyl chloride, Dilute NaOH, Methanol Procedures :1.Dissolve 1 g phenol in 15 cm3 dilute NaOH using a 50 cm3 quickfit flask. 2.Add 2 cm3 benzoyl chloride, stopper the flask and perk up vigorously for 15 minutes. At the end of this time, a solid product should be obtained. 3.Filter off the solid at the affectionateness, rift up any lumps on the filter cover with a spatula. Wash thoroughly with water and drain. 4.Recrystallise the crude ester from wood savor using a quantity of hot solvent passably twice the minimum required for complete solution (This is to find out that the phenyl b enzoate does not speciate until the temperature of the solution has fallen below the warming invest of the ester). Phenyl benzoate separates as colourless crystals. 5.Determine the melting point of the product. Results : restoration (mass in gram) = __________________0.
128 g_____________________ Melting point of pure phenyl benzoate (OC) = ___________70O______________ Melting point of your phenyl benzoate (OC) = ___________69O______________ Questions : 1.why do we use NaOH solution to dissolve phenol instead than water in step 1 ? Because NaOH can be use to change the phe! nol to ion form, which can be more(prenominal) meltable in the aqueous solution. 2. Can we use ethanoyl chloride kind of of benzoyl chloride ? inform briefly. No. Because it will produce another compound, phenyl ethanoate. 3. wherefore do we filter the product using a pump rather than filtration under gravity in step 3 ? It is...If you insufficiency to get a full essay, order it on our website:
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