Homework Answers
Sodium bicarbonate (NaHCO3) can be used as a washing agent to remove any acidic impurities from a crude liquid. As Sodium bicarbonate (NaHCO3) is a basic salt. It readily dissolves and reacts with the mixture.
On washing any mixture with Sodium bicarbonate (NaHCO3), it produces a purer sample.
Reaction of sodium bicarbonate and an acid produces a salt and carbonic acid, the formed carbonic acid readily decomposes to carbon dioxide and water:
NaHCO3 + HCl ---> NaCl + H2CO3
H2CO3 ---> CO2 + H2O
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What is the purpose of the washing with 10% sodium bicarbonate? Explain clearly what aqueous sodium...
What would happen if the product mixture was washed with aqueous sodium bicarbonate before being washed...
What would happen if the product mixture was washed with aqueous sodium bicarbonate before being washed with water? Could the product still be isolated? Explain your answer. Draw the alcohol and carboxylic acid needed to synthesize the ester below. Place an arrow next to the oxygen in the carboxylic acid or alcohol that corresponds to the oxygen indicated by the arrow in the ester below. Given the following reagents, dichloromethane, water, acetone, 10% aqueous HCI, 10% aqueous NaHCO_3 and anhydrous...
During the extraction, indicate which substance(s) is (are) removed at each step with the following reagents: a. washing with water; b. washing with saturated sodium bicarbonate.
During the extraction, indicate which substance(s) is (are) removed at each step with the following reagents: a. washing with water; b. washing with saturated sodium bicarbonate.experiment 6 reaction and compounds.pngexperiment 6 background.pngexperiment 6 mechanism.pngexperiment 6 methodology 2.pngexperiment 6 methodolgy 1.png
2. Show the chemical reaction between sodium bicarbonate and aqueous hydrochloric acid.
2. Show the chemical reaction between sodium bicarbonate and aqueous hydrochloric acid.
what is the purpose of each of the extractions (washings) the crude product? In other word,...
what is the purpose of each of the extractions (washings) the crude product? In other word, what is removed upon washing with (a) water (b) sodium bicarbonate and finally (c) ammonium chloride. The experiment I did is amide synthesis from carboxylic acid and amine and using EDCl with catalyst DMAP and DMF. By doing the extraction. I dilute my reaction mixture with 40 ml of water, pour the contents into separatory funnel. Then add approximately 20 mL of ethyl acetate...
3. What is the purpose of washing a precipitate? Briefly explain how this is done. 4....
3. What is the purpose of washing a precipitate? Briefly explain how this is done. 4. In addition to the step-by-step instructions, the flow chart found on the previous page in quite useful in keeping track of the cations during the experiment. Sketch the flow chart so that the scheme is familiar before beginning the exercise.
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 purpose of extracting the aqueous layer two more times with ether in step...
What is the purpose of extracting the aqueous layer two more
times with ether in step 5?
What is the purpose of washing the combined organic layers with
NaOH in step 6?
Thank you
Reaction 1: Nitration HNO3 NO2 + H2SO4, H20 NO2 toluene NO2 ortho meta para Procedure for Reaction 1: 1) To a stirred solution of 3 ml (44.7 mmoles) 67 % HNO3 in 3.75 mL of water, H2SO4 (9 mL) was slowly added at 10-15 °C. 2)...
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...
briefly explain What is the purpose of using a drying agent like sodium sulfate?
briefly explain What is the purpose of using a drying agent like sodium sulfate?
2. A small amount of 20% sodium hydroxide solution (aqueous) is added prior to the polymerization...
2. A small amount of 20% sodium hydroxide solution (aqueous) is added prior to the polymerization of Nylon 6-6. What purpose does this reagent serve? (2 pts.)
What would happen if the product mixture was washed with aqueous sodium bicarbonate before being washed with water? Could the product still be isolated? Explain your answer. Draw the alcohol and carboxylic acid needed to synthesize the ester below. Place an arrow next to the oxygen in the carboxylic acid or alcohol that corresponds to the oxygen indicated by the arrow in the ester below. Given the following reagents, dichloromethane, water, acetone, 10% aqueous HCI, 10% aqueous NaHCO_3 and anhydrous...
2. Show the chemical reaction between sodium bicarbonate and aqueous hydrochloric acid.
3. What is the purpose of washing a precipitate? Briefly explain how this is done. 4. In addition to the step-by-step instructions, the flow chart found on the previous page in quite useful in keeping track of the cations during the experiment. Sketch the flow chart so that the scheme is familiar before beginning the exercise.
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 purpose of extracting the aqueous layer two more
times with ether in step 5?
What is the purpose of washing the combined organic layers with
NaOH in step 6?
Thank you
Reaction 1: Nitration HNO3 NO2 + H2SO4, H20 NO2 toluene NO2 ortho meta para Procedure for Reaction 1: 1) To a stirred solution of 3 ml (44.7 mmoles) 67 % HNO3 in 3.75 mL of water, H2SO4 (9 mL) was slowly added at 10-15 °C. 2)...
2. A small amount of 20% sodium hydroxide solution (aqueous) is added prior to the polymerization of Nylon 6-6. What purpose does this reagent serve? (2 pts.)
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