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The standard oxidation potentials for Mn...

The standard oxidation potentials for `Mn^(3+)` ion acid solution are `Mn^(2+)overset(-1.5V)toMn^(3+)overset(-1.0V)toMnO_(2)`. Is the reaction `2Mn^(3+)+2H_(2)OtoMn^(2+)+MnO_(2)+4H^(+)` spontaneous under conditions of unit activity? What is the change in free energy?

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The correct Answer is:
Spontaneous, `-48250J`
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The standard oxidation potential for Mn^(3+) ion acid solution are Mn^(2+)overset(-1.5V)rarrMn^(3+) overset(-1.0V)rarr MnO_(2) . Is the reaction 2Mn^(3+)+2H_(2)O rarr Mn^(2+)+MnO_(2)+4H^(+) spontaneous under conditions of unit activity ? What is the change in free energy ?

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In the reaction MnO_(4)^(-)+SO_(3)^(-2)+H^(+)rarrSO_(4)^(-2)+Mn^(2+)+H_(2)O

The Mn^(3+) ion is unstable in solution and undergoes desproportionation reaction to give Mn^(+2), MnO_(2) , and H^(o+) ion. Write a balanced ionic equation for the reaction.

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