Reading Assignment Goals and objectives of the experiment and the procedural summary laboratory notebook. should be written directly in your Pre-lab Questions I. Based on your knowledge of green chemistry, would you consider this procedure as âgreener"? Explain your answer. 2· The liquid-liquid extraction process depends on two solvents be immiscible with each other and having different densities. a. What solvent will be used to extract caffeine from the aqueous tea layer? b. Record the density of this extraction solvent: c. Record the density of water: d. Which one will be the lower layer in the separatory funnel? e. What is the purpose of adding sodium chloride to the aqueous tea mixture? f. What is the purpose of adding sodium carbonate to the aqueous tea mixture?
You transferred the solution of benzoic acid and naphthalene in diethyl ether to the separatory funnel and added on top15 ml of 2.5 M NaOH solution. Where you would find the aqueous solution, at the top or at the bottom of the separatory funnel?
You transferred prepared solution of benzoic acid and naphthalene in diethyl ether to the separatory funnel and added on top15 ml of 2.5 M NaOH solution and you shook the separatory funnel. Where you would find the aqueous solution, at the top or at the bottom of the separatory funnel?
After completing the extraction the procedure in the textbook recommends you to transfer the organic solution into a clean Erlenmeyer flask. What is the composition of organic solution?
After completing the extraction the procedure in the textbook recommends you to transfer the aqueous layer into a clean Erlenmeyer flask. What is the composition of aqueous layer?
Possible answers for all above questions:
1.The aqueous layer is a solution of benzoic acid in water
2. The organic solution is a solution of sodium benxoate in 2.5M aqueous solution
3. The aqueous layer is a solution of sodium benzoate and excess of sodium hydroxide in water
4. Aqueous solution will be found at the bottom of the separatory funnel
5. The organic solution is a solution of aphthalene in diethyl ether
6.The aqueous layer is a solution of sodium benzoate in water
7.The organic solution is a solution of benzoic acid in diethyl ether
8. The organic solution is a solution of naphthalene an benzoic acid in diethyl ether
