Extraction of Acid with Aqueous Base Submitted by: Ernest F. Silversmith, )Morgan State College, Baltimore, Md. 21239 Checked by: E. C. Ibstansek, Hiram College, Hiram, Ohio 44234 PREPARATION laver will be rcd and the anueous laver will be colorless. . ..-. ........- .. Add 2 drops 2 M NaOH and shake." Thc organic layer Prepare a solution of indophenol by stirring 2.0 g of layer will he blue. will br colorless and indophenol sodium salt (Eastman P3457) with 0.26 ml ~ the layers regain their original ~ d 2 ddrops 2 M H C and of acetic acid and 100 ml of benzene and filtering. Also colors, ~h~ cycle can bc as often as drsin:d. have available a 250-ml separatory funnel, water, ether, 2 M NaOH and 2 M HCI. REMARKS DEMONSTRATION
Pour 50 ml water, 50 ml ether and about 1 ml of the indonhenol solution into the funnel,, stonner., shake and allow thc laycrs to separate. Thc organic (upper)
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A694
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Journal of Chemical Education
This is a visual demonstration of the principle that acidic organic substances can be extracted from an organic solvent via conversion to a salt, and the latter extracted from the aaueous solution via reconversion to the acid form.
