What must be done to the following half-reactions before they can be added together? Mn (s)→ Mn ²⁺(aq)+ 2e^- Fe ³⁺ (aq)+ 3 e^- → Fe (s) A)Double the Mn half-reaction. B)Double the Mn half-reaction and triple the Fe half-reaction. C)Triple the Mn half-reaction and double the Fe half-reaction. D)Add H⁺ ions to the left-side of the Mn reaction. E)none of the above

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Quizplus · Accepted Answer

To balance the electrons, triple the Mn half-reaction and double the Fe half-reaction so both have 6 electrons.

What Must Be Done to the Following Half-Reactions Before They