14.17 (HW problem)

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14.17 (HW problem)

Postby stephanieyang_3F » Thu Feb 09, 2017 12:14 pm

How do we know which Fe2+ half reaction to use from the list of half reactions?

Miya McLaughlin 2B
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Re: 14.17 (HW problem)

Postby Miya McLaughlin 2B » Thu Feb 09, 2017 2:13 pm

You would need to use the half reaction that looks like this:

Fe3+ + e- --> Fe2+

This is the only half reaction in which Fe is an ion on both sides. The other ones include Fe(s) in it's solid form. In the question, iron(II) chloride is your only source of iron and it can only give off Fe ions, not Fe(s).

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