Quantitative Chemical Analysis 9e And Sapling Advanced Single Course For Analytical Chemistry (access Card)
Quantitative Chemical Analysis 9e And Sapling Advanced Single Course For Analytical Chemistry (access Card)
9th Edition
ISBN: 9781319090241
Author: Daniel C. Harris, Sapling Learning
Publisher: W. H. Freeman
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Chapter 26, Problem 26.42P
Interpretation Introduction

Interpretation:

The plate height in given capillary electrophoresis has to be calculated.

Concept introduction:

The number of plates in a column is calculated from

N=5.55tr2w1/22trisretentiontimew1/2platewidthNisnumberofplatesincolumn

The plate height is given as

H=LN

Where,

L is length of the column.

N is number of plates in column

H is plate height.

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a. What is the eluent used in the column chromatography here (a “silica plug filtration” is essentially a very short column)? b. The spectroscopy of compound 5b is described in the second half of this excerpt, including 1H-NMR and 13C-NMR (which you will learn about in CHEM 2412L), MS (which you will learn about later in CHEM 2411L) and IR. One of the IR signals is at 3530 cm-1. What functional group does this indicate might be present in compound 5b?
Steps and explanations. Also provide, if possible, ways to adress this kind of problems in general.
a. The first three lines of this procedure describe the reaction used to make compound 5b. In the fourth line, hexane and sodium bicarbonate are added. What organic lab technique is being used here?  b. What is the purpose of the Na2SO4?  c. What equipment would you use to “concentrate [a solution] under reduced pressure”?
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