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Write complete chemical equation for :
(i) Oxidation of `Fe^(2+)"by" Cr_(2)O_(7)^(2-)` in acid medium
(ii) Oxidation of `S_(2)O_(3)^(2-) "by" MnO_(4)^(-)` in neutral aqueous medium

Text Solution

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(i)Acidified potassium dichromate oxidses iorn (II) salt to iron (III)
`Cr_(2)O_(7)^(2)+14H^(+)+6Fe^(2+)rarr2Cr^(3+)+6Fe^(3+)+7H_(2)O`
(ii) In neutral acqueolus median thisulphate is oxidised almost quantitatively to sulphate
`8MnO_(4)^(-)+3S_(2)O_(3)^(2)+H_(2)rarr8MnO_(2)+6SO_(4)^(2-)+2OH^(-)`
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Write complete equations for (i) Oxidation of Fe^(2+) by Cr_(2)O_(7)^(2-) in acidic medium. (ii) Oxidation of S_(2)O_(3)^(2-) by MnO_(4)^(-) in neutral aqueous medium.

Write chemical equation for (i) Oxidation of Fe^(2+) by Cr_2O_7^(2-) . in acidic medium. (ii) Oxidation of S_2O_3^(2-) by MnO_4^- in neutral medium. (iii) Oxidation of I^- by MnO_4^- in alkaline medium. (iv) Oxidation of SO_3^(2-) by Cr_2O_7^(2-) in acidic medium. (v) Oxidation of sulphur dioxide by MnO_4^- in acidic medium. (vi) Reaction of potassium iodide with acidified potassium dichromate.

Knowledge Check

  • The n-factor for K_(2)Cr_(2)O_(7) in acidic medium is

    A
    `+2`
    B
    `+4`
    C
    `+6`
    D
    `+8`

  • Equivalent weight of K_(2)Cr_(2)O_(4) in acidic medium is

    A
    `("Mol. wt")/(3)`
    B
    `("Mol. wt.")/(6)`
    C
    `("Mol. wt.")/(2)`
    D
    `"Mol.wt."`

  • MnO_(4)^(2-) in neutral aqueous medium is disproportionate to

    A
    `2//3` mole of `MnO_(4)^(-)` and `1//3` mole of `MnO_(2)`
    B
    `1//3` mole of `MnO_(4)^(-)` and `2//3` mole of `MnO_(2)`
    C
    `1//3` mole of `Mn_(2)O_(7)` and `1//3` mole of `MnO_(2)`
    D
    `2//3` mole of `Mn_(2)O_(7)` and `1//3` mole of `MnO_(2)`

    • Similar Questions

    Explore conceptually related problems

    Write balanced chemical equations for the conversion of CrO_(4)^(2-) to Cr_(2)O_(7)^(2-) in acidic medium and Cr_(2)O_(7)^(2-) to CrO_(4)^(2-) in basic medium.

    Write oxidation number of Cr in Cr_(2)O_(7)^(2–) .

    On oxidation of S_(2)O_(3)^(2-) by MnO_(4)^(-) in neutral aqueous medium, the oxidation state of S would change from :

    (i) Write an oxidising reaction of K_(2)Cr_(2)O_(7) in the acidic medium. (ii) Write one oxidising reaction of KMnO_(4) in the basic medium.

    1 mol of FeC_(2)O_(4) is oxidized by x mol of Cr_(2)O_(7)^(2-) in acidic medium, x is :

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