In part C of the synthesis of Lidocaine you will have to perform multiple extrac

ID: 587431 • Letter: I

Question

In part C of the synthesis of Lidocaine you will have to perform multiple extractions. Answer the following questions with the correct match.

A) 35 ml of toluene is transferred to the separatory funnel and 20 ml of 3M HCl is added, the separatory funnel has been shaken several times. To which layer the second portion of 20 ml of 3M HCl should be added, the top or the bottom?

B) Two acidic aqueous extracts were combined and 25 nl of 8M KOH solution has been added. This solution has been transferred to the separatory funnel and 15 ml of diethyl ether has been added. The separatory funnel has been shaken several times.Which layer will contain the lidocaine product, the top or the bottom?

C) 35 ml of toluene is transferred to the separatory funnel and 20 ml of 3M HCl is added, the separatory funnel has been shaken several times. Which layer will be aqueous layer, the top or the bottom?

E) 35 ml of toluene is transferred to the separatory funnel and 20 ml of 3M HCl is added, the separatory funnel has been shaken several times. Which layer will contain the lidocaine product, the top or the bottom?

D) Two acidic aqueous extracts were combined and 25 nl of 8M KOH solution has been added. This solution has been transferred to the separatory funnel and 15 ml of diethyl ether has been added. The separatory funnel has been shaken several times. Which layer will be the aqueous one, the top or the bottom?

Explanation / Answer

Synthesis of Lidocaine

A) The second portion of 20 ml HCl should be added to the top layer which is the organic layer having the product in it to form salt of it.

B) The top layer will have the lidocaine product which is the diethyl ether layer (lower density).

C) The bottom layer would be the aqueous layer. Toluene is less denser than water.

D) The bottom layer would be the aqueous layer.

E) the bottom layer would contain the lidocaine in ionic form.

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In part C of the synthesis of Lidocaine you will have to perform multiple extrac

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