if you wanted to extract 15mL of an aqueous layer, why wouldn’t you want to use 45mL of the organic solvent? Why would 20mL be better. Why wouldn’t you use 2mL of the organic solvent?
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if you wanted to extract 15mL of an aqueous layer, why wouldn’t you want to use 45mL of the organic solvent? Why would 20mL be better. Why wouldn’t you use 2mL of the organic solvent?
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- 1.So if you were trying to extract 15mL of an aqueous layer, why wouldn’t you want to use 45mL of theorganic solvent? Why would 20mL be better? 2.Why wouldn’t you use 2mL of the organic solvent?Using the table on slide 7, what ORGANIC solvent could you use to do an extraction of something fromisooctane? What about from acetic acid? b. On slide 7, it says the solvents in grey would not work to extract an aqueous layer. Why not? 6. a. So if you were trying to extract 15mL of an aqueous layer, why wouldn’t you want to use 45mL of theorganic solvent? Why would 20mL be better? b. Why wouldn’t you use 2mL of the organic solvent?Some procedures include the addition of sodium carbonate before liquid-liquid extraction. What is the purpose of this step?
- Chemistry Why was acetanilide not transferred to the aqueous layer in any of the extractions?In addition to a low boiling point and immiscibility with water, why is density important to consider in the selection of an extraction solvent? Would an organic liquid with a density of 1.006 g/mL make a good extraction solvent? Explain.Write the chemical reaction that took place during this experiment.In the first part of your extraction, you added NaOH until the pH was 8. Why is a pH of 8 desired? Why is this pH 8 desired when isolating or extracting caffeine from a drink?
- Explain exactly what you would do when performing the following laboratoryinstructions; that is, write a short procedure.a. “Wash the organic layer with 1.0 mL of 1 M aqueous sodium bicarbonate.”b. “Extract the aqueous layer three times with 1-mL portions of methylenechloride.”Why should we extract the Cyclohexanone in a three step extraction (with 10 ml, 8 ml and 7 ml Ether) rather than in one step (with 25 ml Ether)?What makes ethyl acetate a suitable or unsuitable solvent? What concerns would you have if you were to run a column using hexanes as the solvent for the whole column? Come up with an appropriate solvent gradient to get the best separation of all three compounds
- Consider a mixture containing 0.5 g of benzil and 0.05 g of benzoin. Your task is to isolate benzil in a pure form. Could you accomplish this using an extraction procedure? If yes, explain how you would do this. If not, suggest another technique that would accomplish this.Why is sodium chloride added before extraction the aqueous layer with DCM? How does magnesium sulfate break emulsions?2 Isolation of caffeine from black tea lab Original solvent used was dichloromethane. Alternatively ethyl acetate could have been used as the solvent for this extraction. How would this have changed our procedure for this experiment?