Concept explainers
To Establish: The formula for iron (III) oxide.
Answer to Problem 18.3APP
Foriron (III) oxidethe formula is
Explanation of Solution
Introduction:
The symbol and oxidation number of the positive ion:
Iron (III):
The symbol and oxidation number of the negative ion:
Oxygen:
First write the
Without the sign, one ion’s charge forms the subscript of the other.
In this case, the subscripts already are the lowest whole numbers that maintain the ratio of the ions.
By determining whether the compound is neutral the formula obtained can be checked. The charge on two ferric ions is
Conclusion:
For iron (III) oxidethe formula is
Chapter SH Solutions
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
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