Question

We are doing a synthesis lab of isopentyl acetate (bannana oil)

1.When heating to form isoamyl acetate, the major reason why we did not use a thermometer to monitor the temperature was?

Select one:

a. A reflux cannot get hotter than the boiling point of the solvent.

b. The water jacket prevents solvent from boiling out.

c. Boiling chips prevent bumping.

d. Nothing was being distilled out of the flask.

e. We did not use a Claisen adpator to prevent the setup from being sealed.

If you could be kind and check if these are correct that would be helpful. The answers I choice are in bold.

2.The amount of anhydrous magnesium sulfate used is determined by?

Select one:

a. the stoichiometry of magnesium sulfate to water forming MgSO₄ -7 H₂O

b. seeing excess anhydrous magnesium sulfate powder

c. adding enough magnesium sulfate to cover the liquid

d. seeing MgSO₄ -7 H₂O crystals form

e. seeing magnesium sulfate dissolve

3. The major reason why we swirled the separatory funnel several minutes before shaking it was?

Select one:

a. to saponify the product

b. to allow the reaction to cool down faster

c. to prevent pressure from building up in the separatory funnel

d. to make sure the acid-base reaction was complete

Answer 1

1. When heating to form isoamyl acetate, the major reason why we did not use a thermometer to monitor the temperature was?
a. A reflux cannot get hotter than the boiling point of the solvent.
Reflux is used to prevent the heating up of the reaction beyond the boiling point of the solvent. Therefore, if a reflux is used, using thermometer to monitor the temperature is not necessary

2. The amount of anhydrous magnesium sulfate used is determined by?
b. seeing excess anhydrous magnesium sulfate powder
The amount of anhydrous magnesium sulfate used can be determine by subtracting the excess anhydrous magnesium sulfate from the anhydrous magnesium sulfate used

3. The major reason why we swirled the separatory funnel several minutes before shaking it was?
c. to prevent pressure from building up in the separatory funnel
Swirling the separatory funnel before shaking can prevent building up of pressure.