Question
In: Chemistry
Show an extraction scheme in how to purify the benzaldehyde. Draw the mechanism for each of...
Show an extraction scheme in how to purify the benzaldehyde. Draw the mechanism for each of the four products that can be formed in the first part of the reaction.
Solutions
Expert Solution
Benzaldehyde is commonly contaminated with benzoic acid. It is purified in the following way. Benzoic acid is poorly soluble in water but it is soluble in Na2CO3. So, a sample of benzaldehyde is washed with 10% sodium carbonate and then with water. It is then dried over 5–10 g. of anhydrous magnesium sulfate. A few small crystals of hydroquinone are added with the drying agent. Hydroquinone reacts with O2 more quickly than of benzaldehyde, thus protecting benzaldehyde from oxidation. The dry benzaldehyde is decanted through a cotton plug into a flask and is distilled under reduced pressure.
An extraction scheme to purify the benzaldehyde
queen_honey_blossom answered 2 years agoRelated Solutions
Imine formation with the reaction of aniline with benzaldehyde. Draw mechanism.
Imine formation with the reaction of aniline with benzaldehyde.
Draw mechanism.
name the 2 possible mechanisms for nucleophilic substitution. show (scheme) 1 example for each mechanism.
name the 2 possible mechanisms for nucleophilic substitution.
show (scheme) 1 example for each mechanism.
Make a flow chart of the purification scheme for the following scenario. 7. Benzaldehyde is used...
Make a flow chart of the purification scheme for the following
scenario.
7. Benzaldehyde is used as the starting material for the
synthesis of cinnamic acid. An organic chemistrystudent had made
the mistake of stopping the reaction before it was complete and
ended up with a mixture ofbenzaldehyde and cinnamic acid. Purify
the cinnamic acid. Provide data to show your compound is pure.
4. A pharmaceutical company plans to use a liquid-liquid extraction to purify a drug that is...
4. A pharmaceutical company plans to use a liquid-liquid
extraction to purify a drug that is a weak monoprotic base. The
chemical has a pKb = 9.52 at 25oC. The KD for the neutral form of
this chemical is 210 when using water and chloroform at 25oC.
a. What fraction of this drug will be extracted from a 15.0 mL
aqueous sample into 10.0 mL of chloroform at pH = 9.00 and
25oC?
b. What fraction of this drug will...
What is the reaction scheme and mechanism for the halogen exchange reaction, via an Sn2 mechanism,...
What is the reaction scheme and mechanism for the halogen
exchange reaction, via an Sn2 mechanism, using benzyl bromide as
the electrophilic substrate? In this reaction, the alkyl halide
will react with sodium iodine in acetone.
Can you show how to draw the normal curve for each of the problems and label...
Can you show how to draw the normal curve for each of the
problems and label it as well?
Heights of MEN in the U.S. are normally distributed µ =
69.6 inches with σ = 3 inches.
-________ percent (to nearest %) of men in the U.S. are either
shorter than 5 ft. or taller than 6 ft?
-In a group of 150 U.S. men, approximately ________ of them
should be shorter than 65 inches.
-A male height of _______________...
Can you show how to draw the normal curve for each of the problems and label...
Can you show how to draw the normal curve for each of the
problems and label it as well?
Heights of MEN in the U.S. are normally distributed µ =
69.6 inches with σ = 3 inches.
-________ percent (to nearest %) of men in the U.S. are either
shorter than 5 ft. or taller than 6 ft?
-In a group of 150 U.S. men, approximately ________ of them
should be shorter than 65 inches.
-A male height of _______________...
When trying to purify fluorene, why does a NaOH extraction work best with Benzoic Acid, succinimide,...
When trying to purify fluorene, why does a NaOH extraction work
best with Benzoic Acid, succinimide, and fluorenone but a HCl
extraction works best with ethyl-4-aminobenzoate? Also, draw the
acid/base reaction for each of the reactions.
1) Draw the structure of the product formed by addition of vitamin B1 and benzaldehyde. 2)...
1) Draw the structure of the product formed by addition of
vitamin B1 and benzaldehyde.
2) Ammonia adds to carbonyl groups but is ineffective as a
catalyst for the benzoin condensation. Explain.
3) Write a balanced oxidation-reduction equation for the
oxidation of benzoin by ammonium nitrate (the cupric ion
catalysis need not to be considered).
4) In the benzil oxidation the initial blue color changes to
gren as the reaction proceeds. Why?
5) In dilantin sodium it is the imide...
1) Draw the structure of the product formed by addition of vitamin B1 and benzaldehyde. 2)...
1) Draw the structure of the product formed by addition of
vitamin B1 and benzaldehyde.
2) Ammonia adds to carbonyl groups but is ineffective as a
catalyst for the benzoin condensation. Explain.
3) Write a balanced oxidation-reduction equation for the
oxidation of benzoin by ammonium nitrate (the cupric ion
catalysis need not to be considered).
4) In the benzil oxidation the initial blue color changes to
gren as the reaction proceeds. Why?
5) In dilantin sodium it is the imide...
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