Select the best method Part 1: To remove a solvent from the product (dissolved in the...
Select the best method
Part 1: To remove a solvent from the product (dissolved in the solution)?
(a) Recrystallization (b) Gravity filtration (c) vaccum filtration (d) separatory funnel (e) Evaporator (f) Distillation
Part 2: To precipitate and purify a chemical out of a solution
(a) Recrystallization (b) Gravity filtration (c) vaccum filtration (d) separatory funnel (e) Evaporator (f) Distillation
Homework Answers
Part 1: Ans:- (e) Evaporator
Most of the Organic chemistry research lab use rotary evaporator as standard equipment to remove solvent from product solution. Advantage of using rotary evaporator is the solvent can be collected and recycled.
Now, why the others option are not correct:-
Recrystallization is the process of precipitation and purification of product from solution of impure product. Gravity filtration is process of removing solid impurity from organic liquid. Vacuum filtration filtration is the process by which solid are separated from liquid. By separatory funnel two immiscible solutions are separate. Distillation process is use to remove solvent from the solution composed of solid and low boiling solvent.
Part 2: Ans:-(a) Recrytallization
Reason of selecting this option out of other can also be found from the above discussion.
Add Answer to:
Select the best method
Part 1: To remove a solvent from the product (dissolved in the...
Recrystallization is commonly used in the organic laboratory as a way to: A) remove a reaction...
Recrystallization is commonly used in the organic laboratory as a way to: A) remove a reaction solvent. B) purify an organic liquid. C) separate the components of a liquid mixture. D) purify an organic solid. E) all of the above 1. What is a limiting reactant? A) reactant with the smallest initial mass B) reactant with the largest initial mass C) reactant that is completely consumed during a chemical reaction D) reactant that is NOT completely consumed during a chemical...
What would be the best method in separating the following mixtures and why? Recrystallization, Solvent Partitioning,...
What would be the best method in separating the following mixtures and why? Recrystallization, Solvent Partitioning, Fractional Distillation, Column Chromatography, or Thin Layer Chromatography A) urea and trans-cinnamic acid B) cyclohexane and benzene C) cyclohexanone and urea D) cyclohexene and ethylacetate
What would be the best method in separating the following mixtures and why? Recrystallization, Solvent Partitioning,...
What would be the best method in separating the following mixtures and why? Recrystallization, Solvent Partitioning, Fractional Distillation, Column Chromatography, or Thin Layer Chromatography A) urea and trans-cinnamic acid B) cyclohexane and benzene C) cyclohexanone and urea D) cyclohexene and ethylacetate
Propose another way of synthesizing NMP from the amino ketone hydrochloride salt starting materia...
Propose another way of synthesizing NMP from the amino ketone
hydrochloride salt starting material you used.
Part A: Synthesis of (t)-N,N-dimethyl-3-phenyl-3-(4- trifluoromethylphenoxy)propanamine 1. To the 250-mL round-bottom flask (RBF) containing (t)-3-(dimethylamino)-1-phenylpropanol (product from Lab 6) and a magnetic stir bar, add 4 mL of 4- chlorobenzotrifluoride and 30 mL of dimethylacetamide (DMA) 2. With stirring, add to this mixture 30 mL of 1.0 M potassium tert-butoxide (caustic alkali!) in tert-butyl alcohol using a syringe 3. Using a simple distillation apparatus,...
How can the NMP oxalate salt be converted back to NMP? Here is the procedure: PROCEDURES...
How can the NMP oxalate salt be converted back to NMP? Here is the procedure: PROCEDURES Part A: Synthesis of (±)-N,N-dimethyl-3-phenyl-3-(4-trifluoromethylphenoxy)propanamine To the 250-mL round-bottom flask (RBF) containing (±)-3-(dimethylamino)-1-phenylpropanol (product from Lab 6) and a magnetic stir bar, add 4 mL of 4-chlorobenzotrifluoride and 30 mL of dimethylacetamide (DMA). With stirring, add to this mixture 30 mL of 1.0 M potassium tert-butoxide (caustic alkali!) in tert-butyl alcohol using a syringe. Using a simple distillation apparatus, distill the mixture slowly, with...
number 3 P u Purpose lule TOTTOwing in this exptum a. using hot filtration b. not...
number 3
P u Purpose lule TOTTOwing in this exptum a. using hot filtration b. not cooling (chilling) the hot filtered solution immediately c. washing the crystals in the final step with ice cold water d. using gravity filtration (not vacuum filtration) in the hot filtratio step e. using a stemless funnel in the hot filtration step. 2. What are the requirements for a good recrystallizing solvent. 3. Using the data of Table 6.1, compare the following pairs of liquids...
Extraction of solids: Experiment outlined below Draw a “roadmap” of the experiment, containing chemical structures and...
Extraction of solids: Experiment outlined below
Draw a “roadmap” of the experiment, containing chemical
structures and “layers” (organic and aqueous). This should contain
the individual reactions occurring in each step, and show which
layer the various components are present. Make sure you think about
whether the acetaminophen, caffeine and aspirin are neutral,
protonated or deprotonated.
Preliminary separation obtain a sample (1.0g) of the mixture. weigh the sample and record it. this sample should consist of a 2:1:1 mixture (by mass)...
how to get %recovery? here recovered benzoic acid is 0.14 g. Part 1 - ExtracHon of...
how to get %recovery? here recovered benzoic acid is 0.14 g.
Part 1 - ExtracHon of an Acidic Organic Compound 1. Secure a small, clean separatory funnel to a ring stand with a clamp. 2. Label three small flask (25 or 50 mL) with one of the following: "benzoic acid", "ethyl-4- aminobenzoate" and "organic layer". 3. Obtain exactly 10.0 mL of a solution containing benzoic acid and ethyl-4-aminobenzonate in ethyl acetate. 4. Extract the solution containing the two compounds with...
The alcohol could easily be converted to a tosylate, a good leaving group, and a conventional sub...
The alcohol could easily be converted to a tosylate, a good
leaving group, and a conventional substitution reaction could have
been performed instead of the nucleophilic aromatic substitution
(NAS) reaction. Why was the NAS reaction the preferred method?
(Hint : Look up the nucleophiles of both reactions on chemical
manufacturing site.)
Part A: Synthesis of (t)-N,N-dimethyl-3-phenyl-3-(4- trifluoromethylphenoxy)propanamine 1. To the 250-mL round-bottom flask (RBF) containing (t)-3-(dimethylamino)-1-phenylpropanol (product from Lab 6) and a magnetic stir bar, add 4 mL of 4-...
The alcohol could easily be converted to a tosylate, a good leaving group, and a conventional...
The alcohol could easily be converted to a tosylate, a good
leaving group, and a conventional substitution reaction could have
been performed instead of the nucleophilic aromatic substitution
(NAS) reaction. Why was the NAS reaction the preferred method?
(Hint : Look up the nucleophiles of both reactions on chemical
manufacturing site.)
Part A: Synthesis of (t)-N,N-dimethyl-3-phenyl-3-(4- trifluoromethylphenoxy)propanamine 1. To the 250-mL round-bottom flask (RBF) containing (t)-3-(dimethylamino)-1-phenylpropanol (product from Lab 6) and a magnetic stir bar, add 4 mL of 4-...
Recrystallization is commonly used in the organic laboratory as a way to: A) remove a reaction solvent. B) purify an organic liquid. C) separate the components of a liquid mixture. D) purify an organic solid. E) all of the above 1. What is a limiting reactant? A) reactant with the smallest initial mass B) reactant with the largest initial mass C) reactant that is completely consumed during a chemical reaction D) reactant that is NOT completely consumed during a chemical...
Propose another way of synthesizing NMP from the amino ketone
hydrochloride salt starting material you used.
Part A: Synthesis of (t)-N,N-dimethyl-3-phenyl-3-(4- trifluoromethylphenoxy)propanamine 1. To the 250-mL round-bottom flask (RBF) containing (t)-3-(dimethylamino)-1-phenylpropanol (product from Lab 6) and a magnetic stir bar, add 4 mL of 4- chlorobenzotrifluoride and 30 mL of dimethylacetamide (DMA) 2. With stirring, add to this mixture 30 mL of 1.0 M potassium tert-butoxide (caustic alkali!) in tert-butyl alcohol using a syringe 3. Using a simple distillation apparatus,...
number 3
P u Purpose lule TOTTOwing in this exptum a. using hot filtration b. not cooling (chilling) the hot filtered solution immediately c. washing the crystals in the final step with ice cold water d. using gravity filtration (not vacuum filtration) in the hot filtratio step e. using a stemless funnel in the hot filtration step. 2. What are the requirements for a good recrystallizing solvent. 3. Using the data of Table 6.1, compare the following pairs of liquids...
Extraction of solids: Experiment outlined below
Draw a “roadmap” of the experiment, containing chemical
structures and “layers” (organic and aqueous). This should contain
the individual reactions occurring in each step, and show which
layer the various components are present. Make sure you think about
whether the acetaminophen, caffeine and aspirin are neutral,
protonated or deprotonated.
Preliminary separation obtain a sample (1.0g) of the mixture. weigh the sample and record it. this sample should consist of a 2:1:1 mixture (by mass)...
how to get %recovery? here recovered benzoic acid is 0.14 g.
Part 1 - ExtracHon of an Acidic Organic Compound 1. Secure a small, clean separatory funnel to a ring stand with a clamp. 2. Label three small flask (25 or 50 mL) with one of the following: "benzoic acid", "ethyl-4- aminobenzoate" and "organic layer". 3. Obtain exactly 10.0 mL of a solution containing benzoic acid and ethyl-4-aminobenzonate in ethyl acetate. 4. Extract the solution containing the two compounds with...
The alcohol could easily be converted to a tosylate, a good
leaving group, and a conventional substitution reaction could have
been performed instead of the nucleophilic aromatic substitution
(NAS) reaction. Why was the NAS reaction the preferred method?
(Hint : Look up the nucleophiles of both reactions on chemical
manufacturing site.)
Part A: Synthesis of (t)-N,N-dimethyl-3-phenyl-3-(4- trifluoromethylphenoxy)propanamine 1. To the 250-mL round-bottom flask (RBF) containing (t)-3-(dimethylamino)-1-phenylpropanol (product from Lab 6) and a magnetic stir bar, add 4 mL of 4-...
The alcohol could easily be converted to a tosylate, a good
leaving group, and a conventional substitution reaction could have
been performed instead of the nucleophilic aromatic substitution
(NAS) reaction. Why was the NAS reaction the preferred method?
(Hint : Look up the nucleophiles of both reactions on chemical
manufacturing site.)
Part A: Synthesis of (t)-N,N-dimethyl-3-phenyl-3-(4- trifluoromethylphenoxy)propanamine 1. To the 250-mL round-bottom flask (RBF) containing (t)-3-(dimethylamino)-1-phenylpropanol (product from Lab 6) and a magnetic stir bar, add 4 mL of 4-...
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