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

Question

Chemistry

Elliana Chase

7 November, 20:57

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

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Eric Gentry · Answer 1

Triple the Mn half reaction and double the Fe half reaction

Explanation:

Because ... we have to balance the number of electrons (e) ... which will be eliminated from the equations and they will be combined