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Thread: What does the II mean exactly in Iron(II)-chloride?

  1. #1 What does the II mean exactly in Iron(II)-chloride? 
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    This is a pretty simple question ofcourse, but does the II mean there are 2 Fe's in iron-chloride, or that there are 2 Chlorides? does it refer to the charge of Fe?


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  3. #2 Re: What does the II mean exactly in Iron(II)-chloride? 
    gc
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    Quote Originally Posted by questioner1
    does it refer to the charge of Fe?
    This is correct. In this case the number of chlorides is also 2 because the charge on chloride is negative 1, and two of these balance out the positive 2 charge on Fe.


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  4. #3  
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    thanks!
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  5. #4  
    Reptile Dysfunction drowsy turtle's Avatar
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    Strictly speaking, it refers to the oxidation state of the iron ion.

    For instance, the dichromate molecule (Cr2 07) has a charge of -2, but the chromium has an oxidation state of +6. If this were to form a compound with potassium, we would call it potassium dichromate (VI).
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