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At 298 K, the standard reduction potenti...

At 298 K, the standard reduction potentials are 1.51 V for `MnO_(4)^(-) | Mn^(2+), 1.36 V` for `Cl^(2) | Cl^(-)`, 1.07 V for `Br_(2)|Br^(-),` and 0.54 V for `I_(2)|I^(-)`. At pH=3, permanganate is expected to oxidize `((RT)/(F) = 0.059V)`:

A

`C1^(-),Br^(-)and I^(-)`

B

`C1^(-) and Br^(-)`

C

`Br^(-)and I^(-)`

D

`I(-) only`

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AI Generated Solution

To solve the problem step by step, we will analyze the given standard reduction potentials and determine which species can be oxidized by permanganate ion (MnO4^-) at pH 3. ### Step 1: Write the half-reaction for permanganate reduction The half-reaction for the reduction of permanganate ion (MnO4^-) to manganese ion (Mn2+) in acidic medium is: \[ \text{MnO}_4^- + 8 \text{H}^+ + 5 \text{e}^- \rightarrow \text{Mn}^{2+} + 4 \text{H}_2\text{O} \] The standard reduction potential (E°) for this reaction is given as 1.51 V. ### Step 2: Use the Nernst equation ...
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Knowledge Check

  • The standard reduction potential for the half-cell reaction, Cl_2 + 2e^(-) to 2Cl^(-) will be (Pt^(2+)+2Cl^(-)to Pt + Cl_2 , E_"cell"^@=-0.15 V , Pt^(2+) + 2e^(-) to Pt, E^@=1.20 V)

    A
    `-1.35 V`
    B
    `+1.35 V`
    C
    `1.05 V`
    D
    `+1.05 V`
  • The standard reduction potential for Cu^(2+)//Cu is +0.34V . Calculate the reduction potential at pH=14 for the above couple. K_(SP) of Cu(OH)_(2) is 1.0xx10^(-19)

    A
    2.2 V
    B
    3.4 V
    C
    `-0.22` V
    D
    `-2.2` V
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