Problem: Write Lewis structures that obey the octet rule for the following molecules and ions. (In this case the first atom listed is the central atom.)a. POCl3, SO42-, XeO4, PO43-, ClO4- Considering your answers to parts a, b, and c, what conclusions can you draw concerning the structures of species containing the same number of atoms and the same number of valence electrons?

🤓 Based on our data, we think this question is relevant for Professor Smith's class at MSSTATE.

FREE Expert Solution

Recall that the octet rule states that an element is surrounded by eight electrons in the Lewis structure. 


Exceptions to this rule occur when:

• there is an odd number of electrons, like in radicals

• there are less than 8 electrons or incomplete octet

• there are more than 8 electrons or expanded octet. This occurs to nonmetals from Period 3 to 7.



POCl3 → P is the central atom


Total valence electrons:


                    Valence Electrons

P                   1 × 5 e5 e

O                   1 × 6 e6 e

Cl                  3 × 7 e21 e

Total:  32 valence e


Lewis Structure: 

  • Halogens, when not central atom forms only 1 bond
  • O prefers to form 2 bonds
  • P has an expanded octet 



                                           

Cl's: 8 val eeach, O: 8 val e-, P: 10 val e-                                       Cl's: 8 val eeach, O: 8 val e-, P: 8 val e


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Problem Details

Write Lewis structures that obey the octet rule for the following molecules and ions. (In this case the first atom listed is the central atom.)

a. POCl3, SO42-, XeO4, PO43-, ClO4

Considering your answers to parts a, b, and c, what conclusions can you draw concerning the structures of species containing the same number of atoms and the same number of valence electrons?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Lewis Dot Structure concept. You can view video lessons to learn Lewis Dot Structure. Or if you need more Lewis Dot Structure practice, you can also practice Lewis Dot Structure practice problems.

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Based on our data, we think this problem is relevant for Professor Smith's class at MSSTATE.

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Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition practice problems.