31 Questions
What is the aim of experiment 10.1?
To prepare acetanilide
Which reagent is used for acetylation if acetic anhydride is not available?
Acetyl chloride
What is the function of the air condenser in this experiment?
To cool the reaction mixture
What is the purpose of adding pumice stones in the round bottom flask?
To prevent superheating and bumping
What is the role of the sand bath in this experiment?
To provide heat for the reaction
What is the material required for acetylation if acetic anhydride is not available?
Dry pyridine
What is the purpose of washing the solid with cold water in the acetanilide preparation process?
To remove impurities and neutralize the filtrate
Why is it important to handle acetic anhydride and acetyl chloride carefully in the acetanilide preparation process?
They cause irritation to the eyes and strong fumes in air
If aniline sample is too much coloured, what precaution should be taken before carrying out the experiment?
Distill it before carrying out the experiment
What should be done if the boiling tube becomes unbearable to touch during the acetanilide preparation process?
Cool it under tap water
What is the role of pyridine in the acetanilide preparation process?
Catalyze the reaction between aniline and acetic acid
What is the purpose of recrystallizing the crude acetanilide with hot water?
To obtain white shining needle-shaped crystals
Why should one determine the melting point of perfectly dried and recrystallized sample of acetanilide?
To confirm the purity of the compound
What is an alternative method for preparing acetanilide if acetic anhydride or pyridine is not available?
$Aniline + Acetic\thinspace acid$
Why is it important to use perfectly dry apparatus in the alternative method for preparing acetanilide?
$To\thinspace prevent\thinspace contamination$
What is the function of the air condenser in the preparation of acetanilide?
To ensure efficient reflux of the reaction mixture
What precaution should be taken if the aniline sample is highly colored before carrying out the experiment?
Replace aniline with a fresh, colorless sample
Why is it important to determine the melting point of perfectly dried and recrystallized sample of acetanilide?
To verify the purity of the acetanilide product
What is the role of pyridine in the acetanilide preparation process?
Catalyzing the reaction between aniline and acetic anhydride
Why should one handle acetic anhydride and acetyl chloride carefully in the acetanilide preparation process?
Due to their high reactivity with water and air
What is the material required for acetylation if acetic anhydride is not available?
Acetyl chloride and dry pyridine
What is the purpose of adding a few drops of methanol or ethanol when recrystallising the acetanilide?
To reduce impurities in the recrystallised acetanilide
Why should acetyl chloride be added in lots (0.3 mL at a time) in the preparation of acetanilide?
To prevent excessive foaming
What precaution should be taken if the aniline sample is too much colored?
Distill it before carrying out the experiment
Why is it important to determine the melting point of perfectly dried and recrystallized sample of acetanilide?
To verify its purity
What is an alternative method for preparing acetanilide if acetic anhydride or pyridine is not available?
Using glacial acetic acid and aniline only
Why should one handle pyridine with extreme caution in the acetanilide preparation process?
It is toxic and can cause serious harm if inhaled or absorbed through skin
What is the purpose of washing the solid 2-3 times with cold water in the acetanilide preparation process?
To remove soluble impurities
What is the function of recrystallizing the crude acetanilide with hot water?
To enhance the melting point of acetanilide
What is the material required for acetylation if acetic anhydride is not available?
Aniline and glacial acetic acid only
Why should acetylchloride be added in lots (0.3 mL at a time) in the preparation of acetanilide?
To prevent excessive foaming
Learn about the preparation of acetanilide through the acetylation reaction in the laboratory setting. Understand the process of replacing a hydrogen atom of the aniline compound to obtain acetanilide.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
