During the work-up of the reaction, aqueous sodium bicarbonate is used to wash the organic layer...
- During the work-up of the reaction, aqueous sodium bicarbonate is used to wash the organic layer to remove impurities. What two compounds are removed from the organic layer during this process?
- Oil of wintergreen (methyl salicylate) is a liquid. How can you determine when most of the methylene chloride has been evaporated via rotary evaporation?
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During the work-up of the reaction, aqueous sodium bicarbonate
is used to wash the organic layer...
Create a separation scheme flow chart/diagram to isolate methyl salicylate from a product mixture containing the...
Create a separation scheme flow chart/diagram to isolate methyl salicylate from a product mixture containing the following: Methyl salicylate, methanol, concentrated sulfuric acid. Lab procedure for separation: Extract with 25mL dichloromethane. Drain the bottom organic layer into a beaker. Repeat the extraction with another 25mL portion of dichloromethane, isolate the bottom layer, and then combine it with the first dichloromethane extract. Pour the combined extracts back into the funnel and wash the solution with 25mL of water. Drain the lower...
A reaction work-up for an aqueous reaction mixture calls for extraction first with diethyl ether and...
A reaction work-up for an aqueous reaction mixture calls for extraction first with diethyl ether and then a wash with saturated aqueous sodium chloride. What two functions does the the saturated sodium chloride wash serve? (usually Brine is not added to the aqueous solution during the first extraction) Group of answer choices It pulls water from the organic layer to dry it. It helps force the organic compound into the organic layer. It degasses the solvent It changes the color...
8. Consider a liquid-liquid extraction procedure using a saturated aqueous solution of sodium bicarbonate and t-butyl...
8. Consider a liquid-liquid extraction procedure using a saturated aqueous solution of sodium bicarbonate and t-butyl methyl ether (density= 0.740) in a reaction tube shown below. Identify the organic layer. Explain your answer.
What is the MOST important safety concern when washing the organic layer of this reaction with...
What is the MOST important safety concern when washing the organic layer of this reaction with sodium bicarbonate during liquid-liquid extraction? Group of answer choices -Sodium carbonate gas builds up in the separatory funnel and can cause the glass to become pressurized and explode. -Carbon dioxide is given off during the sodium bicarbonate wash. -Carbon dioxide gas builds up in the separatory funnel and can cause the glass to become pressurized and explode. -Carbon dioxide liquid builds up in the...
During the reaction work up, pentane is used as an organic solvent and there are aqueous...
During the reaction work up, pentane is used as an organic solvent and there are aqueous extractions. Which layer is most dense? A organic layer B aqueous layer
Why did you wash the ether solution with sodium bicarbonate? Write chemical equations for the rea...
Why did you wash the ether solution with sodium bicarbonate? Write chemical equations for the reactions that took place. b. At which purification steps was the unreacted methanol removed in the reaction? Some of it may have been removed in more than one place. c. Three-Step Synthesis of Methyl Anisate (Step 3) 0 CHOH. Н.so, cat.) Wear gloves. Methanol is poisonous. Ether is an anesthetic, so don't breathe it. Sulfuric acid is a strong corrosive acid. Wash any you spill...
3. In liquid-liquid extractions, the organic solution is shaken with aqueous solutions to remove byproducts or...
3. In liquid-liquid extractions, the organic solution is shaken with aqueous solutions to remove byproducts or excess reactants. Identify one compound that is being removed from the organic solution when it is shaken with each aqueous solution below. 4pts a. Extraction of Grignard reaction mixture with water b. Extraction of Grignard reaction mixture with saturated sodium chloride c. Extraction of bleach oxidation mixture with sodium bicarbonate d. Extraction of either oxidation mixture with sodium thiosulfate
CHEM 242L Exp. 4 Report/ Synthesis of Oil of Wintergreen Name Score: 20 1) Assess the effectivene...
please answer all these questions, thank you.
CHEM 242L Exp. 4 Report/ Synthesis of Oil of Wintergreen Name Score: 20 1) Assess the effectiveness of the experiment and your technique by A) reporting the yield of each step in grams and percent as well as the overall percent yield (What is "overall percent yield?). SHOW ALL CALCULATIONS! B) Give a complete analysis of the identity and purity of your final product and any isolated intermediates 2 What was the purpose...
Provide a flow chart detailing the acid/base extraction/separation of the compounds show below. Your answer must...
Provide a flow chart detailing the acid/base extraction/separation of the compounds show below. Your answer must employ the following reagents: methylene chloride, hydrochloric acid (1M & 6M), sodium hydroxide (1M & 6M), 10% sodium bicarbonate (aq). Clearly indicate the product(s) and layers formed following each step of your separation scheme. IMPORTANT: p-cresol is soluble in sodium hydroxide solution but insoluble in neutral water or sodium bicarbonate solution. 2-ethylbenzoic acid is soluble in both sodium hydroxide and sodium bicarbonate solutions. Use...
In lab, we added 0.180g ethyl trans-cinnamate, 4 mL dicholormethane, and 1.2 equivalents of mCPBA (60%...
In lab, we added 0.180g ethyl trans-cinnamate, 4 mL dicholormethane, and 1.2 equivalents of mCPBA (60% by weight) to a vial. Then we rinsed the solid with 3 mL CH2Cl2, added 5 mL of 10% aqueous sodium sulfite and separated it in a separatory funnel, and then washed it with 5 mL of 5% aqueous sodium bicarbonate to remove any remaining acid. Finally, we dried the organic layer over CaCl2. We then removed the remaining CH2Cl2 using the rotary evaporator....
8. Consider a liquid-liquid extraction procedure using a saturated aqueous solution of sodium bicarbonate and t-butyl methyl ether (density= 0.740) in a reaction tube shown below. Identify the organic layer. Explain your answer.
Why did you wash the ether solution with sodium bicarbonate? Write chemical equations for the reactions that took place. b. At which purification steps was the unreacted methanol removed in the reaction? Some of it may have been removed in more than one place. c. Three-Step Synthesis of Methyl Anisate (Step 3) 0 CHOH. Н.so, cat.) Wear gloves. Methanol is poisonous. Ether is an anesthetic, so don't breathe it. Sulfuric acid is a strong corrosive acid. Wash any you spill...
3. In liquid-liquid extractions, the organic solution is shaken with aqueous solutions to remove byproducts or excess reactants. Identify one compound that is being removed from the organic solution when it is shaken with each aqueous solution below. 4pts a. Extraction of Grignard reaction mixture with water b. Extraction of Grignard reaction mixture with saturated sodium chloride c. Extraction of bleach oxidation mixture with sodium bicarbonate d. Extraction of either oxidation mixture with sodium thiosulfate
please answer all these questions, thank you.
CHEM 242L Exp. 4 Report/ Synthesis of Oil of Wintergreen Name Score: 20 1) Assess the effectiveness of the experiment and your technique by A) reporting the yield of each step in grams and percent as well as the overall percent yield (What is "overall percent yield?). SHOW ALL CALCULATIONS! B) Give a complete analysis of the identity and purity of your final product and any isolated intermediates 2 What was the purpose...
Provide a flow chart detailing the acid/base extraction/separation of the compounds show below. Your answer must employ the following reagents: methylene chloride, hydrochloric acid (1M & 6M), sodium hydroxide (1M & 6M), 10% sodium bicarbonate (aq). Clearly indicate the product(s) and layers formed following each step of your separation scheme. IMPORTANT: p-cresol is soluble in sodium hydroxide solution but insoluble in neutral water or sodium bicarbonate solution. 2-ethylbenzoic acid is soluble in both sodium hydroxide and sodium bicarbonate solutions. Use...
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