recrystallization

recrystallization - Okay, the headers! If you look to the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Name _______________________________________ Instructor ____________________________________ Chem ____________ Section/Color ______________ Date ________________________________________ Laboratory Questions These questions are to be completed and turned in at the beginning of the pre-lab period. PR E -L A B Q U ES T I O NS 1. What is the purpose of recrystallization with an organic compound? 2. Outline the steps in setting up and doing a vacuum filtration. What are advantages of vacuum filtration over gravity filtration? 3. The lab manual states that 30 mL of hot water can dissolve 1.5 g of pure acetanilide. Use chemfinder.com to find the approximate solubility of acetanilide at room temperature. How much acetanilide will remain dissolved in 30 mL of water at room temperature after crystallization is complete? (Show your calculation.) This explains why recrystallization always gives less than a 100% recovery of the desired product. 4. Draw the structures of acetanilide, aniline and acetic acid (Use chemfinder.com or the index to your textbook.) What simple molecule is ‘eliminated’ if aniline and acetic acid react to form acetanilide? Circle the amide functional group in acetanilide.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/17/2011 for the course CHEM 237 taught by Professor Yu-chinli during the Spring '07 term at Texas A&M.

Ask a homework question - tutors are online