Sulfate Ion
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Sulfate Ion
When you draw the sulfate ion (SO4)^2-, how can the sulfur share six electrons and have a total of 12? I thought the max was 8... Thanks in advance.
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- Posts: 55
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Re: Sulfate Ion
This is an anion and thus the compound has gained two more electrons. Suphur has 6 valence electrons, plus is sharing 6 electrons with oxygen. Therefore, the total is 12. Sulphur has two single bonds and two double bonds distributed between the 4 oxygen atoms. since each single bond shares 2 electrons and each double shares 4, this equals 12 in total.
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Re: Sulfate Ion
Sulfur can have an expanded octet by using the empty 3d orbitals to accommodate "extra" electrons.
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Re: Sulfate Ion
Atoms in period 3 or higher, like sulfur, can have more than 8 valence electrons because they can occupy the d-orbitals.
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Re: Sulfate Ion
If you were to calculate the formal charge of the sulfur in this Lewis structure, you would get a formal charge of 0, which is favorable.
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