Why is it iron 2 and not iron 3?

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The discussion centers on the reaction between hydrochloric acid and iron, specifically why iron(II) chloride (FeCl2) is produced instead of iron(III) chloride (FeCl3). The key point is that the hydrogen ions (H+) in hydrochloric acid are not strong enough oxidizers to convert iron from its +2 oxidation state to +3. This limitation in oxidation potential is crucial in determining the product of the reaction, leading to the formation of FeCl2 rather than FeCl3.
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Why is it iron 2 and not iron 3?

Hi all

Upon the reaction of Hydrochloric acid with Iron.. the following equation represents the reaction:

Fe + 2HCl -------> FeCl2 + H2


Why isn't the product FeCl3? I don't understand what makes it not possible for iron to form this chloride salt.. why isn't the equation:

2Fe + 6HCl --------> 2FeCl3 + 3H2
 
Chemistry news on Phys.org


You will have to compare redox potentials to see the reason. H+ is not an oxidizer strong enough to oxidize iron beyond 2+.
 


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