EBK EXPLORING CHEMICAL ANALYSIS
EBK EXPLORING CHEMICAL ANALYSIS
5th Edition
ISBN: 8220101443908
Author: Harris
Publisher: MAC HIGHER
Question
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Chapter 23, Problem 23.15P

(a)

Interpretation Introduction

Interpretation:

Electro-osmosis process has to be explained.

Concept Introduction:

Electro-osmosis is a kinetic process in which the transport of bulk fluid through a porous membrane under the influence of an electric field is taken place.

(b)

Interpretation Introduction

Interpretation:

Reason behind electro-osmotic flow in a silica capillary to be five times faster at pH 9 than in pH 3 has to be explained.

Concept Introduction:

Electro-osmotic velocity is the speed of the dominant ion in the diffused part of the double layer. It is calculated as follows:

    UElectro-osmosis=(μElectro-osmosis)(E)

Here, UElectro-osmosis is speed of the flow of electro-osmosis.

μElectro-osmosis is ionic mobility of the dominant ion.

E is electrode potential between cathode and anode plate.

(c)

Interpretation Introduction

Interpretation:

Reason behind small flow and pH to be nearly independent when SiOH group on a silica capillary wall are converted into Si-O-(CH2)17CH3 has to be explained.

Concept Introduction:

Refer to part (b).

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