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1. What is liquid-liquid extraction beneficial to an organic chemist?
A) Extraction - when performing liquid - liquid extraction with a combination of an acidified aqueous...
A) Extraction - when performing liquid - liquid extraction with a combination of an acidified aqueous phase and an organic solvent; what phase would a basic compound (e.g., an amine; R-NH 2) prefer amongst the options below: 1- the basic compound will be ionised and prefer the organic phase 2- the basic compound will be nautral and end up in the organic phase 3- the basic compound will be ionised and prefer the acidic aqueous phase B) Extraction - when...
Extraction - when liquid-liquid extraction is performed with a combination of an acidified aqueous phase and...
Extraction - when liquid-liquid extraction is performed with a combination of an acidified aqueous phase and an organic solvent; in which phase will an acidic compound (e.g., a carboxylic acid; R-COOH) prefer to be amongst the options below? 1- the acidic compoud will be ionized and prefer the organic phase 2- the acidic compound will be ionized and prefer the acidic aqueous phase 3- the acidic compound will be nautral ( non- ionized) and end up in the organic phase
1)When you perform a liquid-liquid extraction using a separatory funnel, which of the following organic solvent...
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)...
An experiment performed using solid to liquid extraction, liquid-liquid extraction, heating, and recrystallization to isolate caffeine,...
An experiment performed using solid to liquid extraction, liquid-liquid extraction, heating, and recrystallization to isolate caffeine, was not totally successful due to their being very little to no product of caffeine left when the time came to recrystallize the pure caffeine. During the experiment what could of caused there to be not enough caffeine to recrystallize it? ethyl acetate was used as the organic solvent hexane and acetone was used to recrystallize the crude caffeine, through mixture and boiling. Could...
1) during liquid liquid extraction ( LLE) it is normal to use separatory funnel, and two...
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)-Briefly explain the role of the hydrochloric acid during the liquid-liquid extraction procedure. Draw the acid-base...
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...
A chemist tests a sample of a clear organic liquid by adding potassium permanganate solution to...
A chemist tests a sample of a clear organic liquid by adding potassium permanganate solution to one sample and bromine in methylene chloride to another. The purple color of the first sample and the reddish brown color of the second sample do not change. The chemist concludes that the compound is saturated the compound is unsaturated the compound is polyunsaturated. the compound is an alkene (or possibly, an alkyne).
Post-Lab Report Extraction of Caffeine from Tea Leaves 1. What is liquid-liquid extraction? Explain its principle...
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...
Pre-Lab Questions of Exp.4 Extraction (liquid-liquid and liquid –solid) Define extraction? How you choose solvent for...
Pre-Lab Questions of Exp.4 Extraction (liquid-liquid and liquid –solid) Define extraction? How you choose solvent for proper extraction? What is the difference between liquid-liquid and liquid-solid extraction? What are nutrients? Give two examples
(a) In liquid-liquid extraction, define and distinguish between (a) distribution constant and (b) distribution ratio [5...
(a) In liquid-liquid extraction, define and distinguish between (a) distribution constant and (b) distribution ratio [5 marks] (b) Using suitable equations, outline the pH dependency of extraction of a carboxylic acid (RCOOH) from water into an immiscible organic solvent.
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...
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