
Concept explainers
Interpretation:
The Lewis diagrams for CCl4, SO42−, ClO4− and PO43− are to be compared. The two things that are alike about Lewis diagram for CCl4, SO42−, ClO4− and PO43−, are to be identified. The Lewis diagrams of SeO42− and CI4 are to be predicted.
Concept Introduction:
The Lewis structure shows the connectivity between atoms by identifying the lone pairs of electrons in a compound. Lewis structures are also known as Lewis dot structures. The valence electrons around an atom are shown by dots. Bonds between atoms are shown by lines and the lone pair of electrons is shown by a pair of dots.

Answer to Problem 77E
The Lewis diagrams for CCl4, SO42−, ClO4− and PO43− are shown below.
The number of valence electrons present in CCl4, SO42−, ClO4− and PO43− are same and number of atoms attached to central metal atom are also same. Therefore they all have tetrahedral shape.
The Lewis diagrams for SeO42− and CI4 are shown below.
Explanation of Solution
The number of valence electrons present in CCl4, SO42−, ClO4− and PO43− are 32 e−. The distribution of valence electrons is in the form of bond pairs and lone pairs.
The Lewis diagrams for CCl4, SO42−, ClO4− and PO43− are shown below.
Figure 1
The two things that are alike about Lewis diagram for CCl4, SO42−, ClO4− and PO43−, are shown below.
• The number of valence electrons present in all species (CCl4, SO42−, ClO4− and PO43−) involving SeO42− and CI4 are same (32 e−).
• The number of atoms attached to central metal atom in all species (CCl4, SO42−, ClO4− and PO43−) involving SeO42− and CI4 are same that is four atoms. Therefore, the shape of all species is tetrahedral.
The Lewis diagrams for SeO42− and CI4 are shown below.
Figure 2
The Lewis diagrams for CCl4, SO42−, ClO4− and PO43− are shown in Figure 1.
The number of valence electrons present in CCl4, SO42−, ClO4− and PO43− are same and number of atoms attached to central metal atom are also same. Therefore they all have tetrahedral shape.
The Lewis diagrams for SeO42− and CI4 are shown in Figure 2.
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Chapter 13 Solutions
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