What is significance of understanding miscibility of solvents during Liquid-liquid extraction process? Use an example to...
Why are ethanol and acetone unsuitable solvents for liquid-liquid extraction?
1) during liquid liquid extraction ( LLE) it is normal to use separatory funnel, and two non- miscible phases of solvents , for ex: water as polar phase and ethyl acetate is the organic phase. density of water is 1,0 g/ ml, while density of ethyl acetate is 0.90 g/ ml at 25.0 celsius degrees. which of the two solvents will end up at the buttom of the separatory funnel? 2) ) during liquid liquid extraction ( LLE) it is...
1. Describe the four main green solvents. Provide one example of the use of each solvent. (10marks) 2. Describe the Beckman rearrangement of cyclohexanone oxime and the formation of ε‐caprolactamium hydrosulfate. (6marks) 3. Explain how liquid‐liquid biphasic chemistry works and give an example of a biphasic system. (6marks) 4. Describe the problems with fluorous solvents. How might some of these problems be overcome? (6marks) 5. Your supervisor has just told you to synthesize a new chemical. How would you choose...
1. What is an emulsion? How would an emulsion form during a liquid/liquid extraction? 2. Draw the structure for caffeine. What part of caffeine is basic? 3. What form is caffeine in when dissolved in soda? Draw the structure.
If you were to scale the liquid CO2 extraction to a large scale extraction, what factors would you consider in order to make the process green?
Explain why you would use NaOH for a liquid-liquid extraction of 2-phenylphenol. Explain in terms of intermolecular interactions, pH and compound structure.
1)-Briefly explain the role of the hydrochloric acid during the liquid-liquid extraction procedure. Draw the acid-base reaction between lidocaine freebase and hydronium chloride to help your discussion and circle the organic species that is more soluble in water. 2)- Briefly explain the role of the potassium hydroxide during the liquid-liquid extraction procedure. Draw the acid-base reaction between lidocaine hydrochloride and potassium hydroxide to help your discussion and circle the organic species that is would be more soluble in the organic...
1)When you perform a liquid-liquid extraction using a separatory funnel, which of the following organic solvent is on the bottom of the aqueous phase and which is on top? (write your answer by the solvent name) a) Ethyl acetate b) hexane c) Dichloromethane d) diethyl ether 2) If you are performing a liquid-liquid extraction and you have a mix of a carboxylic acid and a non-acidic compound, which combination of solvents would you use for the separation? a) dichloromethane/HCI b)...
Post-Lab Report Extraction of Caffeine from Tea Leaves
1. What is liquid-liquid extraction? Explain its principle and show illustrations. 2. What are alkaloids and xanthines? 3. Aside from being a natural stimulant, what are the other effects of caffeine in the human body? 4. What are tannins? What are the manifestations of tannins in tea? why is it necessary to boil the solution when extracting the components from the tea leaves? 6. What can be done to avoid tannins from...
When an activity model is needed to deal with the design of a liquid-liquid extraction process, the best choice among the following is (a) Wilson equation (b) NRTL equation (c) van Laar equation (d) two-parameter Margules equation O (d) O (b) 0 (a) O(C)