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    K2Cr2O7 (VI) is an oxidisng agent

    If I add Fe3+, Fe3+ will be oxidised to Fe2+

    So the pale yellow solution of Fe3+ will ---> pale green solution of Fe2+

    And, Cr2O72- ------> reduction Cr3+, this will be orange ---> green

    that right?
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    (Original post by ILoveUSA)
    K2Cr2O7 (VI) is an oxidisng agent

    If I add Fe3+, Fe3+ will be oxidised to Fe2+

    So the pale yellow solution of Fe3+ will ---> pale green solution of Fe2+

    And, Cr2O72- ------> reduction Cr3+, this will be orange ---> green

    that right?
    Fe3+ becoming Fe2+ would be reduction, not oxidation. However, the reverse reaction should be possible, assuming their standard cell potentials are suitably different/the activation energy is low enough.
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    (Original post by ILoveUSA)
    K2Cr2O7 (VI) is an oxidisng agent

    If I add Fe3+, Fe3+ will be oxidised to Fe2+

    So the pale yellow solution of Fe3+ will ---> pale green solution of Fe2+

    And, Cr2O72- ------> reduction Cr3+, this will be orange ---> green

    that right?
    Everything is correct apart from Fe3+ being oxidised to Fe2+ - it is the other way around. Remember, that oxidation is loss of electrons and going from Fe3+ to Fe2+ involves a gain of 1 electron, which is actually reduction.
 
 
 
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