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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Speculate on the reason the TcO4 ion is held less strongly to a column of Al2O3 than in the Mo O42− ion.

Interpretation Introduction

Interpretation:

The pertechnetate ion (TcO4-) is held less strongly to a column of alumina (Al2O3) than in the MoO4-2 ion. The reason behind this has to be given.

Concept Introduction:

Column chromatography: Column chromatography is one of the methods used to isolate a single chemical compound from a mixture of compounds using solid phase like silica, alumina and liquid phase like hexane and ethyl acetate, etc.

Columns used for ion exchange are characterized by the presence of charged groups covalently attached to the stationary phase.

The attractive forces binding an anion to the column are related to the anion charge.

Explanation

The attractive forces binding an anion to the column are related to the anion charge.

The pertechnetate ion (TcO4-) is an univalent anion (anion charge is 1) while the MoO4-2 ion is a divalent anion (anion </

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