Chemistry > Experiment > [SOLVED]CHEM 2101 Experiment 5 (All)

[SOLVED]CHEM 2101 Experiment 5

Document Content and Description Below

Experimental: Week 1: In the first week of the experiment we started by boiling 100 mL of distilled water in a 400 mL beaker on a hot plate. After the water came to a boil the beaker was removed and... the three tea bags, which were previously weighed, were added to the hot water and the contents were stirred for approximately two minutes. The tea bags were then removed and placed between two watch glasses to squeeze as much liquid as possible out of them before disposing of the tea bags. The solution was then cooled by swirling the flask in cold water and placed into a seperatory funnel. This set up was found in appendix M. 20 mL of dichloromethane was added to the funnel. The contents were stirred and vented according to the procedure in appendix M. The layers were allowed to separate and then the bottom layer of dichloromethane was drained into a clean 125 mL Erlenmeyer flask. This step was repeated two more times. Then the aqueous layer was poured out the top of the funnel into a labelled beaker. The approximately 60 mL of dichloromethane extracts were returned to the funnel and extracted twice with 20 mL of cold 6M NaOH. It was important to note that the aqueous layer was on top and the caffeine was in the dichloromethane layer, which was on the bottom. Each time we withdrew the dichloromethane layer into the labelled flask and the water into the labelled beaker. Afterwards, we put the dichloromethane layer back into the seperatory funnel for the next wash. Finally, we washed the dichloromethane with 20 mL of cold distilled water, and the dichloromethane was poured into a clean Erlenmeyer flask. A teaspoon of the drying agent was added. The flask was swirled and stood for five minutes and was then decanted into another flask. In the fume hood, the dichloromethane was removed by heating very gently on a hotplate. Off-white crystals formed and the weight of the crude product was obtained. The melting point was also calculated [Show More]

Last updated: 1 year ago

Preview 1 out of 4 pages

Add to cart

Instant download

document-preview

Buy this document to get the full access instantly

Instant Download Access after purchase

Add to cart

Instant download

Reviews( 0 )

$12.00

Add to cart

Instant download

Can't find what you want? Try our AI powered Search

OR

REQUEST DOCUMENT
78
0

Document information


Connected school, study & course


About the document


Uploaded On

Oct 01, 2021

Number of pages

4

Written in

Seller


seller-icon
Quiz analyst

Member since 2 years

2 Documents Sold


Additional information

This document has been written for:

Uploaded

Oct 01, 2021

Downloads

 0

Views

 78

Document Keyword Tags

Recommended For You

Get more on Experiment »

$12.00
What is Browsegrades

In Browsegrades, a student can earn by offering help to other student. Students can help other students with materials by upploading their notes and earn money.

We are here to help

We're available through e-mail, Twitter, Facebook, and live chat.
 FAQ
 Questions? Leave a message!

Follow us on
 Twitter

Copyright © Browsegrades · High quality services·