How would I extract benzophenone from acetylsalicylic acid? thanks
ASA has an acid group. Benzophenone does not. Treat mixture with NaHCO3 which makes ASA soluble in water, extract with organic solvent (ASA stays in H2O). Evaporate organic solvent to recover benzophenone. Treat ASA-Na with acid to recover ASA.
To extract benzophenone from acetylsalicylic acid, you would need to employ a separation technique called solvent extraction. Solvent extraction is based on the difference in solubility of the components in the mixture into different solvents.
Here's a step-by-step procedure on how you could extract benzophenone from acetylsalicylic acid:
1. Obtain a mixture of benzophenone and acetylsalicylic acid.
2. Choose a suitable solvent in which benzophenone is highly soluble and acetylsalicylic acid is sparingly soluble. In this case, a common choice is an organic solvent, such as dichloromethane (methylene chloride).
3. Add the mixture to a separatory funnel and add the organic solvent to it. Make sure to add enough solvent to completely saturate the mixture.
4. Gently shake the separatory funnel to allow the two immiscible layers to form: an organic layer (containing benzophenone) and an aqueous layer (containing acetylsalicylic acid).
5. Allow the layers to settle and drain the lower aqueous layer from the funnel by carefully opening the stopcock at the bottom of the separatory funnel. Collect the upper organic layer, which contains benzophenone.
6. Transfer the collected organic layer (containing benzophenone) to a clean container.
7. To further separate benzophenone from the organic solvent, you can use techniques like rotary evaporation, distillation, or solvent removal under reduced pressure.
8. Finally, you can obtain pure benzophenone by allowing the remaining organic solvent to vaporize, leaving behind the solid residue of benzophenone.
Please note that the specific quantities, equipment, and safety precautions required might vary depending on the scale and context of the experiment. It is essential to ensure knowledge and adherence to all necessary safety procedures and regulations when conducting chemical extractions.