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The standard redox potentials for the re...

The standard redox potentials for the reacitons `Mn^(2+)+2barerarrMn` and `Mn^(3+)+barerarrMn^(2+)` are -1.18V and 1.51V respectively. What is the redox potential for the reaction `Mn^(3+)+3barerarrMn`/

A

0.33V

B

1.69V

C

`-0.28V`

D

`-0.85V`

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