+ CH 3 EtOH Ph Experimental Procedure 1. In a 10-mL. Erlenmeyer flask, add 05 ml
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Question
+ CH 3 EtOH Ph Experimental Procedure 1. In a 10-mL. Erlenmeyer flask, add 05 ml. of benzaldehyde and 0200mf e to 1.5 mL of 95% ethanol. 2. Add a spin vane to the flask and cool the solution in an ice-water bath for 5 min. 3. Add 0.75 mL of 2M NaOH dropwise to your reaction over a period of 1 min. 4. Bring the mixture out of the ice-water bath and stir at room temperature for several in. minutes until a yellow precipitate forms. 5. During this time prepare two test tubes: one with 5 ml of ethanol and one with 2.5 mL of 4% acetic acid/ethanol. Cool both test tubes in an ice-water bath. 6. After large amounts of crude product forms, cool the crude mixture in an ice-water bath for 10 min to complete crystallization. 7. Collect the crude product using a Hirsch funnel, rinsing the reaction flask with water. 8. Wash your crude product with 2.0 mL of cold ethanol. (Remember the most efficient way to wash filtered crystals Then wash the product with 2.0 mL of a solution of 4% acetic acid/ethanol. Finally wash the product with another 2.0 mL of cold ethanol. Recrystallize your crude product from 95% ethanol. 9. 10. When the pure product is dry, obtain a mass, a melting point and an IR spectrum.Explanation / Answer
In step 8, you washed the crystals with 4% acid acetic in ethanol to eliminate any trace of the base utilized in step 3.
Remember, you want to obtain the purest product.
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