gen chem destroyer # 70

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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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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.

Do a search this question has came up before.
 
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