Question

Calculate the E°cell for the following equation. Use these standard potentials . ClO-4(aq)+6H3O+(aq)+6Br-(aq)= 3Br2(aq)+ClO-(aq)+9H2O(l)

Calculate the E°cell for the following equation. Use these standard potentials .

ClO-4(aq)+6H3O+(aq)+6Br-(aq)= 3Br2(aq)+ClO-(aq)+9H2O(l)

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Answer #1

ClO^4- + 6H3O+   + 6Br-   --> 3Br2 + ClO- + 9H2O

Eo cell = Eo ( reduction half) - Eo ( oxidation half)                      ( where Eo is standard reduction potential)

             = Eo ( ClO4-/ClO- ) - Eo ( Br2/Br-)

             = 1.36 - 1.09 = 0.27 V                ( Eo values taken from web)

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