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Out of Cr^(2+) and Cr^(3+), which one is...

Out of `Cr^(2+)` and `Cr^(3+)`, which one is stable in aqueous solution ?

Text Solution

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`Cr^(3+)` is more stable in aqueous solution. This is due to greater hydration enthalpy due to smaller size and higher charge.
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Knowledge Check

  • S_(1) : Mn^(2+) compounds more stable than Fe^(2+) towards oxidation to their +3 state. S_(2) : Titanium and copper both in the first series of transition metals exhibits +1 oxidation state most frequently. S_(3) : Cu^(+) ions is stable in aqueous solutions. S_(4) : The E^(0) value for the Mn^(3+)//Mn^(2+) couple much more positive than that for Cr^(3+)//Cr^(2+) or Fe^(3+)//Fe^(2+) ,

    A
    `T TFT`
    B
    `TFFT`
    C
    `TFT T`
    D
    `FFTF`

  • Which one of the following species is stable in aqueous solution?

    A
    `MnO_(4)^(2-)`
    B
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    C
    `Cu^(+)`
    D
    `Cr^(2+)`

  • Which one of the following species is stable in aqueous solution ?

    A
    `Cr^(2+)`
    B
    `MnO_(4)^(2-)`
    C
    `MnO_(4)^(3-)`
    D
    `Cu^(+)`

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    Calculate the number of unpaired electrons in the following gaseous ions: Mn^(3+),Cr^(3+),V^(3+) and Ti^(3+) . Which one of these is the most stable in aqueous solution?

    Calculate the number of unpaired electrons in the following gaseous ion: Mn^(3+) , Cr^(3+),V^(3+) and Ti^(3+) . Which one of these is the most stable in aqueous solution?

    Of the ions Co^(2+), Sc^(3+) and Cr^(3+) which ones will give coloured aqueous solutions and how will each of them respond to a magnetic field and why?

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