Question

In: Chemistry

This is a preparation of aspirin and oil of wintergreen lab 1. Why was cold as...

This is a preparation of aspirin and oil of wintergreen lab

1. Why was cold as opposed to warm water used to wash the aspirin you prepared?

2. Explain why you would or would not expect to observe color change if FeCl3 were added to the following (in words):

a. Pure aspirin

b. Oil of wintergreen

3. How would you prepare each of the following?

a. ethyl acetate (two different ways)

b. Methyl acetate (two different ways)

4. If your experimental yield of aspirin was greater than 100%, how could this occur?

Expert Solution

1. Why was cold as opposed to warm water used to wash the aspirin you prepared?

Answer: Aspirin is soluble in warm water, so we wash aspirin with cold water as there is chance of loss of aspirin in warm water due to its dissolution.

2. Explain why you would or would not expect to observe color change if FeCl3 were added to the following (in words):

a. Pure aspirin: As it is pure, there is no trace of salicyclic acid so no change in colour

b. Oil of wintergreen: It will show change in colour as OH group is attached to benzene ring

3. How would you prepare each of the following?

a. ethyl acetate (two different ways)

We can synthesize ethyl acetate by refluxing carboxlic acid with alcohol

b. Methyl acetate (two different ways)

4. If your experimental yield of aspirin was greater than 100%, how could this occur?

this is possible if the end product aspirin contains some impurties or if aspirin is not completely dry.

queen_honey_blossom answered 2 years ago

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