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Kashi S.

What is the oxidation state of arsenic in the arsenate ion, AsO43?

Bob Smurdly  Follow
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Amber Henderson  Follow

Here Florine is in +1 oxidation state as oxygen has its oxidation as -2 so according to the equation we make where we take “X” as the unknown oxidation state:

2*X - 2 =0

x=1

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Daniel Candler  Follow

The structural formula of AsO4^3- ion is a resonance hybrid of several canonical structures, equivalent to each other. In any of them, a central arsenic atom, which has 5 valence electrons, makes a double bond with an electrically neutral oxygen atom, and three identical single bonds with as many oxygen atoms bearing a single negative charge. Since oxygen is more electronegative than arsenic, the latter nominally loses in favor of the oxygen atoms all of the five electrons it employed in making those four bonds, so that it can be assigned a +5 oxidation number.

In equivalent structures, the As=O double bond is replaced by an As—->O coordinate bond. The results do not change: the whole lone pair employed by As in making that bond is nominally lost in favor of the oxygen atom, so that the oxidation number of As remains +5.

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David Ihnen  Follow

AsO4 -³ is an ion.

So to calculate the oxidation state we have to equate the individual charges sum to the toral charge on rhe ion.

Let the oxidation of As be [math]x[/math].

And we know the oxidation of Oxyegen ion = -2

[math]x + 4(-2) = -3[/math]

[math]x -8 = -3[/math]

[math]x = 5[/math]

Therefore, Arsenic have 5 oxidation number.

+5 oxidation state.

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Bennett Eberle  Follow

There are different answers to your question,

In the compound AsF3, Arsenic has a oxidation number of +3

In the compound H3AsO4, Arsenic has a oxidation number of +5

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Dave Walter  Follow

Oxygen usually has an oxidation number of 2-. Because there are 4 oxygens, they add a 4(-2) = 8- charge to phosphate. We know the charge of phosphate plus the charge of the oxygens must be -3, so the phosphorus in phosphate has oxidation state +5. Hope this helps!

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Cammie Wait  Follow

Oxidation state of Na is +1

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Austin Mccormack  Follow

Arsenate ion is AsO4^3-

Oxidation number of As in ASO4^3- is +5

Calculation:

x + 4 ( O) = -3

x + 4 ( -2) = -3

x - 8 = -3

x = +5

Hope this will be helpful.

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Daniel Gardini  Follow

The chemical formula of arsenate ion is "AsO₄³⁻" instead.

In AsO₄³⁻, the oxidation state of O is -2 as usual, and the total oxidation state is equal to the charge carries by the ion, i.e. -3.

In AsO₃³⁻:
(Oxidation state of As) + 4(-2) = -3
Oxidation state of As = +5

(The above method is used to calculate oxidation number.)
(Although oxidation state and oxidation number are different in concept, their values are the same.)

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