separation of three components mixture benzoic acid 4 aminoacetophene and dimethyl terephthalate

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Separation of Three-Component Mixture: Benzoic Acid, 4-Aminoacetophenone, and Dimethyl Terephthalate For each extraction, the organic layer was extracted twice with 5 mL portions of either 6M HCl or 6M NaOH, followed by a final extraction with distilled water. The flasks into which the aqueous layers were dispensed (from the separatory funnel) were labeled 'HCl extracts' and 'NaOH extracts', respectively. 3M NaOH was used to precipitate out the p-aminoacetophenone. The product was collected by vacuum filtration and dried on a watch glass, under a heat lamp. 0.104 g of dry p-aminoacetophenone was recovered. 3M HCl was used to precipitate out the benzoic acid. The product was collected by vacuum filtration and dried on a watch glass, under a heat lamp. 0.121 g of dry benzoic acid was recovered. Anhydrous sodium sulfate was used to dry the ethereal solution of dimethyl terephthalate. The 'wet' sodium sulfate was then removed by filtration before evaporation of the solvent under gentle heat. The mass of the Erlenmeyer flask with the dried product was 76.872 g. The mass of the empty Erlenmeyer flask was 76.784 g. Analysis: 1. Determine the mass % and mole ratio of each of the three components in the original mixture. 2. Compare the three TLC plates run during the experiment. Do these plates show effective removal of components after each extraction? Based on what each of the three TLC plates shows, determine the identity of each spot in the TLC plate containing all three mixture components. 3. Based on the amount of each component in the original mixture, determine the percent recovery of each (%). 4. Create a flowchart that shows the mixture of Benzoic Acid, 4-Aminoacetophenone, and Dimethyl Terephthalate.

Separation of Three-Component Mixture: Benzoic Acid, 4-Aminoacetophenone, and Dimethyl Terephthalate

For each extraction, the organic layer was extracted twice with 5 mL portions of either 6M HCl or 6M NaOH, followed by a final extraction with distilled water. The flasks into which the aqueous layers were dispensed (from the separatory funnel) were labeled 'HCl extracts' and 'NaOH extracts', respectively.

3M NaOH was used to precipitate out the p-aminoacetophenone. The product was collected by vacuum filtration and dried on a watch glass, under a heat lamp. 0.104 g of dry p-aminoacetophenone was recovered.

3M HCl was used to precipitate out the benzoic acid. The product was collected by vacuum filtration and dried on a watch glass, under a heat lamp. 0.121 g of dry benzoic acid was recovered.

Anhydrous sodium sulfate was used to dry the ethereal solution of dimethyl terephthalate. The 'wet' sodium sulfate was then removed by filtration before evaporation of the solvent under gentle heat. The mass of the Erlenmeyer flask with the dried product was 76.872 g. The mass of the empty Erlenmeyer flask was 76.784 g.

Analysis:
1. Determine the mass % and mole ratio of each of the three components in the original mixture.
2. Compare the three TLC plates run during the experiment. Do these plates show effective removal of components after each extraction? Based on what each of the three TLC plates shows, determine the identity of each spot in the TLC plate containing all three mixture components.
3. Based on the amount of each component in the original mixture, determine the percent recovery of each (%).
4. Create a flowchart that shows the mixture of Benzoic Acid, 4-Aminoacetophenone, and Dimethyl Terephthalate.

Added by Emilio H.

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