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For part 6L.5d, the solutions manual splits two half reactions while including Au(s) in both half reactions. Why do we need to have a solid in each half reaction? Can we not have half reactions with just aqueous substances, thus causing us to have the solids in both half reactions?
When you write the half reactions, you need to have the solid in the equation because it is in its most stable form (gain of electrons to eliminate the +1 and +3 charge in Au). When we are writing the cell notation, we still need to include the solid since it is in our half reactions with a bar separation since there is a change in state (solid vs. aqueous).
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