aspirin

Question 1

What is the name of the procedure where a reaction mixture is heated, the liquid/solvent boils, its vapors are condensed and drips back into the reaction vessel so that no liquid is lost?

Answer 1

reflux

Question 2

Select the correct answer for why most reactions have an activation energy and have to be heated.
Because new bonds have to be made before old bonds can be broken.
Because old bonds have to be broken before new bonds can be made.

Answer 2

Because old bonds have to be broken before new bonds can be made.

Question 3

What method will you use to isolate the product in your reaction in this synthesis?
extraction
crystallization
distillation

Answer 3

crystallization

Question 4

What is the catalyst in this reaction?
phosphoric acid
salicylic acid
acetic anhydride
water

Answer 4

phosphoric acid

Question 5

What is the name of the products that are unavoidably formed the same time as your desired product?

Answer 5

by-products

Question 6

What should be the temperature of the water bath when you are refluxing your reaction?
120-140 degree C
45-55 degree C
100-120 degree C
60-80 degree C

Answer 6

45-55 degree C

Question 7

True or False? You will use recrystallization to purify your reaction product.
True
False

Answer 7

True

Question 8

What are the two methods you will use to characterize your product, i.e. to know how pure it is and what it is?
melting point
TLC
IR spectroscopy
NMR

Answer 8

IR spectroscopy
melting point

Question 9

At the end of the reaction, 1.5 mL of water was added to the reaction mixture. This step encourages crystallization of the product because the product is less soluble in water.

The low solubility of the product in water is due to which of the following?

Answer 9

Hydrophobic effect

Question 10

True or False?

The solution is cooled in an ice bath when crystallizing because the solubility constant decreases with decreasing temperature which will result in more precipitation.

True
False

Answer 10

False