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DAT destroyer General Chem question number 86?

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dallaspage

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I checked the solution, it's kind of being complicated, so could you explain more easily?
I think that Cr has +3 charge in acidic medium, so just multiply +3 and 2.5M , thus the answer is 7.5M.
Is it right?
If you know how to solve it, please explain to me.......
 

lonhosilver

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Yea... .since it says that it is in an acidic solution that means H+'s would be produced.... and the way to calculate Normality from Molarity is multiply the number of H+'s in soultion with the Molarity... and since dichromate went from +6 to Chromate with a +3 then that means three H+'s are in solution and since the molarity is 2.5 then the Normality would be 2.5*3 or 7.5
 
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