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 of the solution
Homework Answers
The salt water pulls the water from the organic layer to the water layer to dry it. This is because the concentrated NaCl solution has the tendency to become more dilute. Salts have a stronger attraction to water than to organic solvents and therefore are used to dry the organic layer.
Option (a) is correct.
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A reaction work-up for an aqueous reaction mixture calls for
extraction first with diethyl ether and...
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Extraction of benzoic acid and 9-fluorenone using diethyl ether. (please do not include ethyl 4- aminobenzoate). I have to create a flow chart to diagram the key steps of the experiment and isolation of products. 0.100g of benzoic acid and 9-fluorenone are dissolved in diethyl ether. The extraction solvent is 5% sodium hydroxide (to extract the acidic component from the organic phase). Saturated sodium chloride is added to the organic layer. drying the organic solution: anhydrous sodium sulfate is added...
What is the amt of ammonium chloride solution, ether for extraction, brine for extraction and MgSO4 needed. Please s...
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Suggestion: Weigh the sucrose directly into a flask. Measule uut liie Wutur using a measuring cylinder. Weigh out the ethyl acetoacetate and add by pipet Reduction using Sodium Borohydride Weigh ethyl acetoacetate (1.5 g) into a round bottomed flask. Add ethanol (15 mL) to dissolve it. Add a magnetic stir bar and fit the flask with a drying tube. Cool...
5. Suppose you are trying to separate butanoic acid and 4-iodotoluene via extraction with diethyl ether...
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Acid/Base Extraction 1. Provide a flow chart detailing the acid/base extraction/separation of the compounds shown below....
Acid/Base Extraction
1. Provide a flow chart detailing the acid/base
extraction/separation of the compounds shown 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
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ethylbenzoic acid is soluble in both sodium hydroxide and...
Write a small introduction in words and a conclusion for this lab report Experiment 9 Acid-Base Extraction Liquid-liquid extraction utilizes the contrast solubilities of solutes in two immiscible...
Write a small introduction in words and a conclusion for this
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Experiment 9 Acid-Base Extraction Liquid-liquid extraction utilizes the contrast solubilities of solutes in two immiscible solvents the separation of a mixture. An extracting solvent can be reactive that changes the character of solute. Consider a mixture of organic acid, organic base, and neutral substance, for example, benzoic acid, aniline, biphenyl, nd phenol. They sodium benzoate. Sodium hydroxide changes phenol to sodium phenoxide. Hydrochloric acid changes aniline to...
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)...
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17. Draw a flow sheet to show how you would separate a mixture of benzoic acid, 2-naphthol, aniline, and naphthalene....
8. Consider a liquid-liquid extraction procedure using a saturated aqueous solution of sodium bicarbonate and t-butyl...
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What is the amt of ammonium chloride solution, ether
for extraction, brine for extraction and MgSO4 needed. Please show
calculations!
Suggestion: Weigh the sucrose directly into a flask. Measule uut liie Wutur using a measuring cylinder. Weigh out the ethyl acetoacetate and add by pipet Reduction using Sodium Borohydride Weigh ethyl acetoacetate (1.5 g) into a round bottomed flask. Add ethanol (15 mL) to dissolve it. Add a magnetic stir bar and fit the flask with a drying tube. Cool...
5. Suppose you are trying to separate butanoic acid and 4-iodotoluene via extraction with diethyl ether and water. (a) Look up the structures and draw them below. Predict which reagent would have a greater preference/affinity for the diethyl ether layer (1 pt) (b) Which solvent will be on the bottom in the separatory funnel (or conical vial) (1 pt)? (c) U to the butanoic acid and which layer would it prefer- aqueous or o pon treatment of butanoic acid with...
Liquid-Liquid Extraction P14. Your instructor gives you 1g of a 50:50 mixture of the following solids and asks you to separate them from one another. First you dissolve the mixture in ether: methyl trains-cinnamate OH trans-cinnamic acid OMe mp 34-38°c mp 133°C Using what you learned in P11-P12, complete the extraction plan below (aqueous acid or base should be added?): Aqueous solution of added Top layer: circle one (aqueous or organic?) Bottom layer: circle one (aqueous or organic?) Beaker compounds...
Acid/Base Extraction
1. Provide a flow chart detailing the acid/base
extraction/separation of the compounds shown 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...
Write a small introduction in words and a conclusion for this
lab report
Experiment 9 Acid-Base Extraction Liquid-liquid extraction utilizes the contrast solubilities of solutes in two immiscible solvents the separation of a mixture. An extracting solvent can be reactive that changes the character of solute. Consider a mixture of organic acid, organic base, and neutral substance, for example, benzoic acid, aniline, biphenyl, nd phenol. They sodium benzoate. Sodium hydroxide changes phenol to sodium phenoxide. Hydrochloric acid changes aniline to...
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)...
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17. Draw a flow sheet to show how you would separate a mixture of benzoic acid, 2-naphthol, aniline, and naphthalene....
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.
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