Explain exactly how you would perform the following laboratory instructions; that is, write a short procedure. “Wash the organic layer with 5.0 mL of 1 M aqueous sodium bicarbonate.” “Extract the aqueous layer three times with 2-mL portions of methylene chloride.”
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Explain exactly how you would perform the following laboratory instructions; that is, write a short procedure.
“Wash the organic layer with 5.0 mL of 1 M aqueous sodium bicarbonate.”
“Extract the aqueous layer three times with 2-mL portions of methylene chloride.”
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- On my lab, involving extraction, it says “wash the organic layer with 1.0 mL of 1 M aqueous sodium bicarbonate” what does that mean exactly? Thanks!If 80% of a desired compound is extracted into the organic phase in each step (leaving 20% in the aqueous layer), how many extractions are necessary to ensure that at least 99% of the compound has been recovered in the organic phase? 1 extraction 2 extractions 3 extractions 4 extractionsIn 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.
- 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.”The method of extraction for Roman chamomile is: Choose one answer. a. cold-press extraction b. steam distillation c. water distillation d. solvent extraction2.3 In an experiment the essential oils from herbs, were extracted with water. Explain how you will separate the oils from the water using liquid-liquid extraction. Discuss the procedure, equipment and extraction solvent choice.
- Assume there is confusion as to the nature of a liquid that is being distilled off from 1,4 dimethoxybenzene. Describe a simple technique you could use to prove the nature of the substance being distilled off.10. Describe how you can decide whether your recrystallized trphenylmethanol is pure or not ?How to tell if recrystallization successfully purified the sample? Why?
- How would you recrystallize a mixture of Benzoic acid and 2-Naphthol? Discuss the choice of solvent and recrystallization process. (Hint. Look up the solubility of these two compounds in different solvents)In the esterification experiment, the organic phase of diethyl ether is washed with 2 portions of 5% NaOH. Why did you wash with aqueous base?a) To remove unreacted alcohol from the mixture.b) To remove unreacted sodium hydroxide from the mixture.c) To remove unreacted Nafion from the mixture.d) To remove unreacted acetic acid from the mixtureProvide a brief justification for the following procedures in drug production. 1.Storing magnesium citrate in the refrigerator. 2. Filtering solution while its hot. 3. Cooled purified water in preparing calcium hydroxide solution. 4. Sterilization of materials for syrup preparation. 5. Addition of potassium iodide in Lugol’s solution.