Pre Lab 5 - Complete Pre Lab of CHEM 2211 including introduction, table of reagents, safety PDF

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Summary

Complete Pre Lab of CHEM 2211 including introduction, table of reagents, safety and procedure, and mechanisms and BCE as required....

Description

Patel 1 Experiment 5 Separation of a Three-Compound Mixture via Acid/Base Extraction Introduction Extraction is a technique used to separate mixtures of compounds. We will be separating a three-compound mixture of acidic, basic, and neutral from one another. The technique used to separate the three components is known as acid/base extraction which is a specific type of liquid/liquid extraction. Throughout the experiment, each component’s inherent acid/base properties will be used in order to move them between immiscible aqueous and organic layers. Each component will be collected and analyzed as it is separated from the primary solution of methylene chloride. The acid/base reactions that take place are simple proton transfers that in turn cause shifts in compound polarity. The polarity shifts consequently allow for the isolation of each component and overall separation. Detailed mechanisms for each acid/base conversions will be noted throughout the experiment. Through this lab, experimenters will learn that even the simplest chemical properties can be used to separate components. Table of Reagents Compound

Structure

MW g/mol

MP BP (℃) (℃)

Densit y g/cm^ 3

Solubility

Benzoic Acid

122.12

Very slightly soluble in cold water

2methoxybenzoic acid

152.15

Slightly soluble

pKa/ pKb

Patel 2

O-toluic Acid

136.2

Benzocaine

165.21

Diphenylmethan ol

184.23

Slightly soluble

Sodium Hydroxide

40.0

Easily soluble in cold water

13.8 (very basic)

Hydrochloric Acid

36.461

Soluble in cold & hot water...