How to find the Oxidation Number for Fe in Fe3O4 : Iron (II,III) oxide
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2 سال پیش
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To find the correct oxidation
To find the correct oxidation state of Fe in Fe3O4 (Iron (II,III) oxide), and each element in the compound, we use a few rules and some simple math.
Note that Fe3O4 has a fractional oxidation state for the Fe. This is because it consists of FeO and Fe2O3. Individually these have whole number oxidation numbers. But together in Fe3O4 we end up with a fractional ox. number on the Fe.
See: https://en.wikipedia.org/wiki/Iron(II...
First, since the Fe3O4 doesn’t have an overall charge (like NO3- or H3O+) we could say that the total of the oxidation numbers for Fe3O4 will be zero since it is a neutral compound.
We write the oxidation number (O.N.) for elements that we know and use these to figure out oxidation number for Fe.
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RESOURCES
How to Find Oxidation Numbers (rules and examples): How to Find Oxidation Numbers (Rules...
Oxidation Numbers Practice: Finding Oxidation Numbers Practice Pr...
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GENERAL RULES
Free elements have an oxidation state of zero (e.g. Na, Fe, H2, O2, S8).
In an ion the all Oxidation numbers must add up to the charge on the ion.
In a neutral compound all Oxidation Numbers must add up to zero.
Group 1 = +1
Group 2 = +2
Hydrogen with Non-Metals = +1
Hydrogen with Metals (or Boron) = -1
Fluorine = -1
Oxygen = -2 (except in H2O2 or with Fluorine)
Group 17(7A) = -1 except with Oxygen and other halogens lower in the group
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We know that Oxygen usually is -2 with a few exceptions. When Oxygen is in a peroxide, like H2O2 (Hydrogen peroxide), it has a charge of -1. When it is bonded to Fluorine (F) it has an oxidation number of +1.
Here it is bonded to element symbol so the oxidation number on Oxygen is -2. Using this information we can figure out the oxidation number for the element Fe in Fe3O4.
Note that Fe3O4 has a fractional oxidation state for the Fe. This is because it consists of FeO and Fe2O3. Individually these have whole number oxidation numbers. But together in Fe3O4 we end up with a fractional ox. number on the Fe.
See: https://en.wikipedia.org/wiki/Iron(II...
First, since the Fe3O4 doesn’t have an overall charge (like NO3- or H3O+) we could say that the total of the oxidation numbers for Fe3O4 will be zero since it is a neutral compound.
We write the oxidation number (O.N.) for elements that we know and use these to figure out oxidation number for Fe.
---------
RESOURCES
How to Find Oxidation Numbers (rules and examples): How to Find Oxidation Numbers (Rules...
Oxidation Numbers Practice: Finding Oxidation Numbers Practice Pr...
----------
GENERAL RULES
Free elements have an oxidation state of zero (e.g. Na, Fe, H2, O2, S8).
In an ion the all Oxidation numbers must add up to the charge on the ion.
In a neutral compound all Oxidation Numbers must add up to zero.
Group 1 = +1
Group 2 = +2
Hydrogen with Non-Metals = +1
Hydrogen with Metals (or Boron) = -1
Fluorine = -1
Oxygen = -2 (except in H2O2 or with Fluorine)
Group 17(7A) = -1 except with Oxygen and other halogens lower in the group
----------
We know that Oxygen usually is -2 with a few exceptions. When Oxygen is in a peroxide, like H2O2 (Hydrogen peroxide), it has a charge of -1. When it is bonded to Fluorine (F) it has an oxidation number of +1.
Here it is bonded to element symbol so the oxidation number on Oxygen is -2. Using this information we can figure out the oxidation number for the element Fe in Fe3O4.
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در تاریخ 1401/03/31 منتشر شده
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