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gen chem destroyer # 70

Discussion in 'DAT Discussions' started by vvvv, May 27, 2008.

  1. vvvv

    2+ Year Member

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    Calculate the normality. I know the formula of Normality is N=M x number e- (loss/gain).
    In the equation Cr2O7 ----Cr+3.
    Ox Cr in Cr2O7 is +6 and ox of Cr in Cr+3 is +3
    So the different btw them is 3. and N= M x 3. This is the answer.

    But do we have to balance the equation first, then number e- gain is 6 not 3? someone help me plz.
     
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  3. Zerconia2921

    Zerconia2921 Bring your A-game!
    2+ Year Member

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    Do a search this question has came up before.
     

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