Homework Help: ap chemistry

Posted by brian on Friday, October 15, 2010 at 8:26pm.

what is the galvanic cell for the redox reaction between sodium dichromate and mercury(I) nitrate in an acidic solution.

ap chemistry - DrBob222, Friday, October 15, 2010 at 8:46pm
For starters, I would balance the reaction between
Na2Cr2O7 + HgNO3 ==>
ap chemistry - brian, Friday, October 15, 2010 at 8:59pm
is it a double replacement reaction?
2NaNO3 + Hg2Cr2O7
ap chemistry - DrBob222, Friday, October 15, 2010 at 9:06pm
No. Hg^+1 (which by the way I wrote incorrectly as HgNO3 and it should have been Hg2(NO3)2) is oxidized to Hg^+2 and Cr2O7^-2 is reduced to Cr^+3. That's why they call it a redox equation; there is reduction and oxidation taking place.
ap chemistry - brian, Friday, October 15, 2010 at 9:11pm
Thank you Dr. Bob. with that information I figured out my question.

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