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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

Cerium, as noted in Applying Chemical Principles: 22.3 The Rare Earths, is a relatively abundant lanthanide element that has some important uses. Cerium(IV) oxide. CeO2, is widely used as a polishing agent for glass. Cerium(III) sulfide, Ce2S3, is becoming more widely used as a red pigment to replace cadmium pigments, which are environmentally less desirable.

(a) Give the electron configurations (using the noble gas notation) for Ce, Ce3+, and Ce4+.

(b) Is either Ce3+ or Ce4+ paramagnetic? If so, how many unpaired electrons does each have?

(c) The solid state structure for CeO2 is shown below. Describe the unit cell of the compound. How is this structure related to the formula?

images

(a)

Interpretation Introduction

Interpretation: The electronic configuration for given species has to be determined.

Concept introduction:

Paramagnetic property: The presence of unpaired electrons in the electronic configuration of the metal ion in coordination complex.

Diamagnetic property: The absence of unpaired electrons of the metal ion in coordination compound which do repel by the magnet.

Explanation

The electronic configuration of cerium and its ions are,

Ce[Xe]4f15d16s2C

(b)

Interpretation Introduction

Interpretation: The magnetic property has to be determined.

Concept introduction:

Paramagnetic property: The presence of unpaired electrons in the electronic configuration of the metal ion in coordination complex.

Diamagnetic property: The absence of unpaired electrons of the metal ion in coordination compound which do repel by the magnet.

(c)

Interpretation Introduction

Interpretation: The unit cell has to be described and also how structure related to the formula has to be determined.

Concept introduction:

Paramagnetic property: The presence of unpaired electrons in the electronic configuration of the metal ion in coordination complex.

Diamagnetic property: The absence of unpaired electrons of the metal ion in coordination compound which do repel by the magnet.

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