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Find the oxidation number of: Cr in K(...

Find the oxidation number of:
Cr in `K_(2)Cr_(2)O_(7)`

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To find the oxidation number of chromium (Cr) in potassium dichromate, \( K_2Cr_2O_7 \), we can follow these steps: ### Step 1: Identify the oxidation states of the other elements - The oxidation number of potassium (K) is +1. - The oxidation number of oxygen (O) is -2. ### Step 2: Write the equation based on the compound The formula for potassium dichromate is \( K_2Cr_2O_7 \). In this compound, there are: ...
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Knowledge Check

  • Balance the following equation by oxidation number method: K_(2)Cr_(2)O_(7)+FeSO_(4)+H_(2)SO_(4) to Cr_(2)(SO_(4))_(3)+Fe_(2)(SO_(4))+K_(2)SO_(4)+H_(2)O

    A
    `Cr_(2)O_(7)^(2-)+14H^(+)+6Fe^(2+)rarr 6 Fe^(3+)+2Cr^(3+)+7H_(2)O`
    B
    `2K^(+)+Cr_(2)O_(7)^(2-)+7SO_(4)^(2-)+6Fe^(2+) rarr 3 Fe^(3+) + SO_(4)^(2-)+Cr^(3+)+K^(+)+7H_(2)O`
    C
    `Cr_(2)O_(7)^(2-)+2K^(+)+7H^(+)+6Fe^(2+)rarr 6 Fe^(3+) + 6 Cr^(3+) + K^(+)`
    D
    `Cr_(2)O_(7)^(2-)+7H^(+)+6Fe^(2+)rarr 3 Fe^(2+)+2Cr^(3+)+2K^(+) + 7H_(2)O`

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