Chem lab 10 - lab report PDF

Preview

Summary

lab report...

Description

Name : Chowdhury Nahiyan Lab day : Wednesday

Lab partner : Victoria Hyde

Lab  Instructor : Gabby Kerr

Lab time : 1:00 pm - 4:50 pm

Title : Lab 10: Exp 7: Green synthesis of Camphor Purpose : The purpose of this experiment is to form Camphor from a secondary alcohol Isoborneol by using Glacial acetic acid.

Introduction: Camphor used to be made by distilling the bark and wood of the camphor tree. Now a days Camphor is chemically manufactured from turpentine oil. Camphor products can be rubbed on the skin (topical application) or inhaled. Be sure to read the label to find out how the product should be administered. People use camphor topically to relieve pain and reduce itching. It has also been used to treat fungal infections of the toenail, warts, cold sores, hemorrhoids, and osteoarthritis.

Chemical Reaction :

Learning Objectives : 1. We should be able to understand how Oxidation and Reduction reaction is happening in this experiment. 2. Should be able to know that how Chemists create medicine from natural resource. 3. Should be able to calculate Atom Economy.

Lab Safety : -

Wear splashproof monogoggles.

-

Wear full pant and apron to protect skin from harsh chemicals.

Experimental Procedure: In this lab experiment, take 0.38 gram of Isoborneol, 0.20 ml of Glacial acetic acid 5ml of NaOCl ( bleach ) into a screw cap vial and put a stir bar to it and keep stiring it for 10 minutes. After the stirring, seal it with parafilm and stir it again for 30 minutes. For evey 5 minutes, add NaOCl to a few drops to get a positive result in a Strach-Iodide paper. After the test if the result the comes out positive, add enough NaHSO4 to get a negative result. Cool the reaction mixture for 10 minutes in a ice water bath and collect the byproduct by vaccum filtration. Dry the crude product then weigh it.

Results and Data :  Compound

 MW or molarity

Amounts (used/formed) (mass/ volume)

Moles used or formed

154.3 g/mol

0.384 g

2.5 x 10^-3 mole

Sodium Hypochlorite

74.4 g/mol

5 ml

0.372 mole

Glacial acetic acid

60.1 g/mol

0.20 ml

1.20 x 10^-2 mole

Saturated sodium bisulfate

104.06 g/mol

0.10 ml

1.04 x 10^-2 mole

Camphor Crude

152.2 g/mol

0.319 g

2.75 x 10^-3 mole

Camphor Sublimed

152.2 g/mol

0.035 g

2.30 x 10^-4 mole

Borneol

Melting point of Borneol

------------------------------------

Melting point of Product

------------------------------------

Theoretical yeild of camphor in grams: ( 152.2 g/mol ) x ( 2.5 x 10^-3 mole ) = 0.380 gram

Calculations : Percentage yeild : ( 0.319 g/ 0.3805 g ) x 100% = 83.84 % Atom economy : Molecular weight of Borneol = 152.25 g/mol, Glacial acetic acid = 60.01 g/mol & Molecular weight of Camphor = 152.23 g/mol ( 152.23 / 60.1 + 152.25 ) = 0.72 References : 1.http://www.utdallas.edu/~scortes/ochem/OChem1_Lecture/Class_Materials/17_redox_states_c arbon.pdf

2. http://homepages.gac.edu/~ghofmeis/chem141/handouts/redox.pdf 3. http://www.greener-industry.org.uk/ 4. Multiscale Operational Organic Chemistry by John W. Lehman 4 th custom edition....