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Contents contributed and discussions participated by YJ Choi

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pH and pOH - 1 views

chemed.chem.wisc.edu/...pH-and-pOH-969.html
shared by YJ Choi on 29 Nov 09 - Cached
  • Taking the antilog of both sides, we have
    • YJ Choi
      YJ Choi on 29 Nov 09
       
      Is there a typo in the following equation?
  • There is a very simple relationship between the pH and the pOH of an aqueous solution at 25°C. We know that at this temperature
    • YJ Choi
      YJ Choi on 29 Nov 09
       
      Isn't the second "Kw" in the following equation redundant?
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The Rate Equation - 2 views

chemed.chem.wisc.edu/...The-Rate-Equation-999.html
shared by YJ Choi on 19 Oct 09 - Cached
  • . In the figure the tangents at t = 15 shave been drawn
    • YJ Choi
      YJ Choi on 19 Oct 09
       
      From "...tangents at t=15 SHAVE been drawn" to "...tangents at t=15 HAVE been drawn"
  • We say that the order of the reaction with respect to component A is a, while the order with respect to B is b. The overall order of the reaction is a + b.
  • When this happens the reaction is said to be zero order in H3O+, because (cH,sub>3O+</sub>)0 = 1
    • YJ Choi
      YJ Choi on 19 Oct 09
       
      notation in parentheses should be fixed
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The Nature of Electromagnetic Radiation - 0 views

chemed.chem.wisc.edu/...romagnetic-Radiation-1391.html
shared by YJ Choi on 07 Sep 09 - Cached
  • Figure 1
    • YJ Choi
      YJ Choi on 07 Sep 09
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Atomic Structure and Isotopes - 0 views

chemed.chem.wisc.edu/...ructure-and-Isotopes-1217.html
shared by YJ Choi on 07 Sep 09 - Cached
  • When particles are emitted into a closed container, they slowly pick up electrons from their surroundings, and eventually the container becomes filled with helium
    • YJ Choi
      YJ Choi on 07 Sep 09
       
      I wonder if this is how Helium gas is industrially manufactured
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Analysis of Compounds - 0 views

chemed.chem.wisc.edu/...nalysis-of-Compounds-1210.html
shared by YJ Choi on 06 Sep 09 - Cached
  • A combustion train. H2O and C2O, produced by combination of O2 with H and C in the sample, are selectively absorbed by tubes containing Dehydrite [Mg(ClO4)2•3H2O] and ascarite (NaOH on asbestos).
    • YJ Choi
      YJ Choi on 06 Sep 09
       
      "CO2" instead of "C2O"
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Equations and Mass Relationships - 0 views

chemed.chem.wisc.edu/...d-Mass-Relationships-1209.html
shared by YJ Choi on 06 Sep 09 - Cached
  • Similarly, the ratio of the amount of[[Image:]]produced to the amount of[[Image:]]
    • YJ Choi
      YJ Choi on 06 Sep 09
       
      Images are missing
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Using Chemical Equations in Calculations - 0 views

chemed.chem.wisc.edu/...ions-in-Calculations-1207.html
shared by YJ Choi on 06 Sep 09 - Cached
  • invo1ving
    • YJ Choi
      YJ Choi on 06 Sep 09
       
      typo: "involving"
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Balancing Chemical Equations - 0 views

chemed.chem.wisc.edu/...g-Chemical-Equations-1233.html
shared by YJ Choi on 05 Sep 09 - Cached
  • 2NaMnO4 + H2O2 + 3H2SO4 → 2MnSO2 + Na2SO4 + 3O2 + 4H2O
    • YJ Choi
      YJ Choi on 05 Sep 09
       
      Shouldn't the coefficient on Oxygen gas on the product side be a "10" instead of a "3"?
  • 2NaMnO4 + H2O2 + 3H2SO4 → 2MnSO2 + Na2SO4 + 6O2 + 4H2O
    • YJ Choi
      YJ Choi on 07 Sep 09
       
      I counted 22 Oxygen atoms on the reactant side, and so shouldn't the red "6" be a "5" to equal 22 Oxygen atoms on the product side? (Sorry to bother the editor again)
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