In organic chemistry lab we just completled a \"Lidocaine Synthesis\". I have so

Question

In organic chemistry lab we just completled a "Lidocaine Synthesis". I have some questions to clarify before we take the in class exam. 1. Based on apperence and melting point; how can we validate if the crystals are pure lidocaine? 2. When using the seperatory funnel in extraction, we washed the organic layer with water and would shake then drain the aqueous layer out. After a couple of washes with water, we then use HCL to extract and collect this aqueous layer seperatley. Following the extraction with HCL we then again washed the organic solution with water. Any of the washes with water were collected then combined at the end of using seperatory apparatus. Why would we wash the oganic layer with water again after using HCL? Does it yeild more product? 3. What compund were we dissolving in the aquoues extract?

Explanation / Answer

1) Melting point of pure Lidocaine is 680C. Any deviation in this value indicates the presence of impurities or some times may be some other compound.

3) hYDROCHLORIC ACID - LIDOCAINE SALT IS PRESENT IN THE AUEOUS EXTRACT

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.