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chemistry

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Pt(s) | Mn2+(aq), MnO4-(aq), H+(aq) || H+(aq), IO3-(aq) | I2(s) | Pt(s)

Pt(s) | Mn2+(aq) | MnO2(s) | H+(aq) || H+(aq) || PbO2(s) | Pb2+(aq) | Pt(s)

how come the first one has comas within cell notation but not the second one,

  • chemistry -

    Are you sure of the second one? It appears to have two salt bridges. || and ||

  • chemistry -

    oops, the second one should be
    Pt(s) | Mn2+(aq) | MnO2(s) | H+(aq) || H+(aq) | PbO2(s) | Pb2+(aq) | Pt(s)

    but can you clarify the comma one

  • chemistry -

    Commas separate multiple species in the same phase. The single bar is used to separate phases.

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