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posted by  canuck911 on 11/27/2008 4:36:42 PM  |  status: Live  

Reactions at Electrodes during Electrolysis - ///Lifesaver///-

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Question Details:

Answer the following questions by selecting the appropriate half-reaction. Assume that in each case the experiment is performed in an electrolysis cell having electrodes made of non-reacting material.

Which half-reaction will take place at the anode during the electrolysis of 1.0 M AgNO3?




Which half-reaction will take place at the cathode during the electrolysis of 1.0 M H2O2 solution containing 1.0 M H2SO4?




Which half-reaction will take place at the anode during the electrolysis of 1.0 M H2O2 solution containing 1.0 M H2SO4?




Which half-reaction will take place at the anode during the electrolysis of molten MgCl2?




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could someone help me with this I keep getting this wrong
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posted by Ricky Wilkins on 11/27/2008 9:11:15 PM  |  status: Live
Asker's Rating: Helpful   
canuck911's comment:
"thank you, but that didn't work"
Response Details:
 By refer the standered reduction potential values we can answer the given reactions.
 1) The half-reaction will take place at the anode during the electrolysis of 1.0 M AgNO3 is
           At anode :   2H2O(l)  ------->  O2(g)  +  4H+(aq) + 4e-
           At cathode:   Ag+(aq) + e  ------->  Ag(s)
 2) The  half-reaction will take place at the cathode during the electrolysis of 1.0 M H2O2 solution containing 1.0 M H2SO4
 is
            At cathode :  -------> 2H2O(l)
 3)        At anode:   2H+(aq) + 2e  ---------> H2(g)
 4)  The half-reaction will take place at the anode during the electrolysis of molten MgCl2 is
           At anode :  Mg (aq)   --------->  Mg+2 (aq)  + 2e-
 
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