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Posers and Puzzles

Posers and Puzzles

  1. Subscriber AThousandYoung
    It's about respect
    01 Nov '04 09:45
    I am extremely frustrated. I am doing a lab report on electrochemistry and I cannot for the life of me figure out how to use E(1/2) to identify substances. How do I know what potential some reaction should appear at? For example, I know the "standard potential" of O2(g) + 4H+ + 4e- <=>2H2O = +1.229 V. This same textbook that gives me this information has a diagram where this reaction has an E(1/2) of ~-0.9 or -1 V vs SCE. Do I subtract 2.2 for the SCE to get the E^o=1.229? If so, how come this doesn't work for the peak they show at ~-0.1 for the reduction of O2 to H2O2? (-0.1 - 0.22 ~ -0.3 =/= - 0.68 = - E^o).
  2. 04 Nov '04 16:01
    Originally posted by AThousandYoung
    I am extremely frustrated. I am doing a lab report on electrochemistry and I cannot for the life of me figure out how to use E(1/2) to identify substances. How do I know what potential some reaction should appear at? For example, I know the "standard potential" of O2(g) + 4H+ + 4e- <=>2H2O = +1.229 V. This same textbook that gives me this informa ...[text shortened]... eak they show at ~-0.1 for the reduction of O2 to H2O2? (-0.1 - 0.22 ~ -0.3 =/= - 0.68 = - E^o).
    hey....simple....Calculate the full wave potential and divide it by 2....
  3. Subscriber AThousandYoung
    It's about respect
    04 Nov '04 18:28 / 1 edit
    STFU or I will smite thee.

    I found out. Apparently it's standard potential minus electrode potential. I was using the wrong reaction apparently.

    THANKS FOR NOTHING RHP!!!1!
  4. Donation !~TONY~!
    1...c5!
    04 Nov '04 21:53
    Originally posted by AThousandYoung
    STFU or I will smite thee.

    I found out. Apparently it's standard potential minus electrode potential. I was using the wrong reaction apparently.

    THANKS FOR NOTHING RHP!!!1!
    I hate chemistry, and labs in general with a burning passion. Next Semester's Chem Lab is gonna be the death of me.