FRONT COVER LAB REPORT Essay

CHM 456

PREPARED BY: AHMAD FAIZ ZIKRI BIN ALIAS

GROUP

AS 202 2M1

DATE

16/3/2015

TIME

3. 10 PM HOURS – six. 00 PM

LECTURER'S NAME

Dr . rer. nat MOHD TAJUDIN MOHD ALI

GOAL:

To separate an assortment of benzoic acid and a neutral substance (triphenylmethanol or 1, 2, 4, 5-tetrachlorobenzene) into its pieces by removal and also to get the melting level.

THEORY:

Extraction is a procedure for transferring a solute from one solvent to a different. In this experiment, a mixture of benzoic acid and a neutral compound (triphenylmethanol or you, 2, four, 5-tetrachlorobenzene) into its components by extraction. The mixture can be dissolved in diethyl ether (common identity is ether). Both components are soluble in this solvent. Then a 1 M NaOH solution is used to draw out the benzoic acid in the form of its water-disolvable salt, sodium benzoate (three extractions to make sure complete removal), leaving the neutral mixture in the azure layer. The three aqueous ingredients are combined and the two components will be recovered since follow: 1 . The simple compound by washing, blow drying and evaporating the azure layer. 2 . Benzoic acid solution by acidifying the aqueous layer to form benzoic acidity, which precipitates. The benzoic acid is then recovered by simply filtration, cleaned and dried.

PROCEDURE:

1 ) 0. twenty-four grams of unknown test and 0. 12 grms of benzoic acid happen to be weighed and was put into a test out tube. 2 . 10 milliliters ether (very flammable, toxic) was added to the mix and the evaluation tube was shaked to dissolve the mixture. a few. Then the answer was transferred to the separatory funnel and 5 milliliters of 1M NaOH was added. It was cap snugly. The tiers was combined by swirling and banging gently pertaining to 30 seconds. 4. Any pressure was vented by tilting the direct and beginning the end cork. a few. The prevent cork was closed, shaked and again vented. The mixture occured stand allowing the layers to separate. six. The top level was the ether layer plus the bottom layer was the aqueous layer. six. The aqueous layer was drained...

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