(a) Write the possible oxidation and reduction half-reactions that occur when magnesium is immersed in each of the following solutions: (i) HCl, (ii) an HCl solution containing dissolved oxygen, (iii) an HCl solution containing dissolved oxygen and, in addition, Fe2+ ions.
(b) In which of these solutions would you expect the magnesium to oxidize most rapidly? Why?
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July 5, 2011

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