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Solved: Write a formula for the ionic compound that forms

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 54P Chapter 5

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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Problem 54P

Write a formula for the ionic compound that forms from each pair of elements.

(a) aluminum and oxygen

(b) beryllium and iodine

(c) calcium and sulfur

(d) calcium and iodine

Step-by-Step Solution:
Step 1 of 3

Solution 54P

Here, we are going write the formula of the ionic compound that forms from each pair of elements.

Ionic bonding is possible in a compound, when the valence electrons are transferred among the atoms of the compound. It generates positively and negatively charged ions.

(a) aluminum and oxygen

The electronic configuration of Al = [Ne]3s2 3p1

The electronic configuration of O =[He]2s2 2p4

The valence electron of Al = 3

Valence electrons of O = 6

For the formation of ionic bond, each atom of the molecule should attain octet or noble gas configuration by losing or gaining of electrons between them. Here, each Al atom donates three electrons to O atom to form Al2O3.Since Al attains noble gas configuration and O attains octet.

The formula of the ionic compound is Al2O3.

2 Al donates  = 3  X 2 =6e

3 O need = 3 X 2=6 e

(b) beryllium and iodine

The electronic configuration of Be = [He] 2s2

The electronic configuration of I = [Kr] 4d105s25p5

The valence electron of Be = 2

Valence electrons of I = 7

For the formation of ionic bond, each atom of the molecule should attain octet or noble gas configuration by losing or gaining of electrons between them. Here, each Be atom donates one  electron to I atom to form BeI2 . Since, Be attains noble gas configuration whereas I attains octet by accepting the electrons.

The formula of the ionic compound is BeI2.

(c)...

Step 2 of 3

Chapter 5, Problem 54P is Solved
Step 3 of 3

Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

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