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

question 27

Multiple Choice

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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