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In the determination of iron in an ore, the ore (mostly Fe2O3) is first dissolved in HCl(aq). A slight excess of Sn2 is added to reduce Fe3 to Fe2 . Enter the net ionic equation for the redox reaction.

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Answer:

2FeāŗĀ³ + Snā‚‚ ā†’ 2FeāŗĀ² + 2SnāŗĀ²

Explanation:

A redox reaction occurs between a compound that loses electrons and others that gain an electron. The first is being oxidized, and the other is being reduced.

In this situation, in the compound Feā‚‚Oā‚ƒ, the iron, has an oxidation number equal to +3, so it's FeāŗĀ³, and it will gain 1 electron to become FeāŗĀ². Because it was first dissolved in HCl, we must use the ion at the equation. The other compound Snā‚‚ will be oxidized to SnāŗĀ², so it will need to lose 2 electrons.

So, it will be necessary 2 FeāŗĀ³ for this reaction happen:

2FeāŗĀ³ + Snā‚‚ ā†’ 2FeāŗĀ² + 2SnāŗĀ²

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