Best content in Chem 109H Fall 2009

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 on 29 Nov 09
  
  Is there a typo in the following equation?
  
  <div class="cArrow"> </div><div class="cContentInner">Is there a typo in the following equation?</div>
  
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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 on 29 Nov 09
  
  Isn't the second "Kw" in the following equation redundant?
  
  <div class="cArrow"> </div><div class="cContentInner">Isn't the second "Kw" in the following equation redundant?</div>
  
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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 on 19 Oct 09
  
  From "...tangents at t=15 SHAVE been drawn" to "...tangents at t=15 HAVE been drawn"
  
  <div class="cArrow"> </div><div class="cContentInner">From "...tangents at t=15 SHAVE been drawn" to "...tangents at t=15 HAVE been drawn"</div>
  
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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.
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When this happens the reaction is said to be zero order in H3O+, because (cH,sub>3O+</sub>)0 = 1
- YJ Choi on 19 Oct 09
  
  notation in parentheses should be fixed
  
  <div class="cArrow"> </div><div class="cContentInner">notation in parentheses should be fixed</div>
  
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ChemPaths UW-Madison on 25 Oct 09

Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it). Also: the correction for the first part is "tangents at t=15 s have been drawn" - don't forget your units!

<div class="cArrow"> </div><div class="cContentInner">Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it). Also: the correction for the first part is "tangents at t=15 s have been drawn" - don't forget your units!</div>

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Reaction Mechanisms - 3 views

chemed.chem.wisc.edu/...Reaction-Mechanisms-1438.html

shared by ChemPaths UW-Madison on 23 Oct 09 - Cached

- ChemPaths UW-Madison on 23 Oct 09
  
  This page now has the correct equations for the example.
  
  <div class="cArrow"> </div><div class="cContentInner">This page now has the correct equations for the example.</div>
  
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Chemistry 2009 - 2 views

nobelprize.org/...2009

Nobel Prize 2009

shared by John Moore on 07 Oct 09 - Cached

John Moore on 07 Oct 09

Nobel Prize in Chemistry, 2009

<div class="cArrow"> </div><div class="cContentInner">Nobel Prize in Chemistry, 2009</div>

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Properties of Alkanes - 0 views

chemed.chem.wisc.edu/...roperties-of-Alkanes-1398.html

chemistry

shared by ChemPaths UW-Madison on 29 Sep 09 - Cached

ChemPaths UW-Madison on 29 Sep 09

Updated including chiral centers example.

<div class="cArrow"> </div><div class="cContentInner">Updated including chiral centers example.</div>

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ChemPaths UW-Madison on 29 Sep 09

Updated page to include chiral carbons example.

<div class="cArrow"> </div><div class="cContentInner">Updated page to include chiral carbons example.</div>

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Internet Explorer 8: Home page - 0 views

www.microsoft.com/...default.aspx

browser upgrade IE

shared by ChemPaths UW-Madison on 14 Sep 09 - Cached

ChemPaths UW-Madison on 14 Sep 09

If you are having trouble viewing portions of the online text, you may need to upgrade to the most recent version of IE for PC. This corrects a glossary pop-up box issue.

<div class="cArrow"> </div><div class="cContentInner">If you are having trouble viewing portions of the online text, you may need to upgrade to the most recent version of IE for PC. This corrects a glossary pop-up box issue.</div>

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ChemPaths UW-Madison on 14 Sep 09

Upgrade your browser to IE 8

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The Covalent Bond - 0 views

chemed.chem.wisc.edu/...The-Covalent-Bond-1350.html

shared by ChemPaths UW-Madison on 14 Sep 09 - Cached

The orbital is centered between the two atoms, so electron density is highest there. Again, as said above, this reduced the total energy of the system, and electrons in this orbital will thus lead to a covalent bond between the two atoms. This orbital is referred to as a bonding orbital.b)With the LUMO molecular orbital of H2 there is zero electron density between the two hydrogen atoms. There is a node in the orbital exactly the two atoms.
- Michael Boykin on 14 Sep 09
  
  Isn't this a contradiction? The top portion says the highest density is between the two atoms, and the bottom part says there is zero electron density between the two atoms...
  
  <div class="cArrow"> </div><div class="cContentInner">Isn't this a contradiction? The top portion says the highest density is between the two atoms, and the bottom part says there is zero electron density between the two atoms...</div>
  
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- ChemPaths UW-Madison on 14 Sep 09
  
  In part (b), the question asks about the LUMO - or the Lowest (Energy) Unoccupied Molecular Orbital. It is where the 3rd electron would go, if you tried to put it into this molecule. Thus what the last sentence in this solution states: "If electrons occupied this orbital, it would lead to the dissolution of the covalent bond." Does that make sense?
  
  <div class="cArrow"> </div><div class="cContentInner">In part (b), the question asks about the LUMO - or the Lowest (Energy) Unoccupied Molecular Orbital. It is where the 3rd electron would go, if you tried to put it into this molecule. Thus what the last sentence in this solution states: "If electrons occupied this orbital, it would lead to the dissolution of the covalent bond." Does that make sense?</div>
  
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Precipitation Reactions and Solubility - 0 views

chemed.chem.wisc.edu/...ecipitation-Reactions-942.html

preciptiation solubility chemistry

shared by ChemPaths UW-Madison on 14 Sep 09 - Cached

ChemPaths UW-Madison on 14 Sep 09

Solubility Rules can be found here.

<div class="cArrow"> </div><div class="cContentInner">Solubility Rules can be found here.</div>

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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 on 05 Sep 09
  
  Shouldn't the coefficient on Oxygen gas on the product side be a "10" instead of a "3"?
  
  <div class="cArrow"> </div><div class="cContentInner">Shouldn't the coefficient on Oxygen gas on the product side be a "10" instead of a "3"?</div>
  
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2NaMnO4 + H2O2 + 3H2SO4 → 2MnSO2 + Na2SO4 + 6O2 + 4H2O
- 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)
  
  <div class="cArrow"> </div><div class="cContentInner">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)</div>
  
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ChemPaths UW-Madison on 07 Sep 09

Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it). Also - the correction would be for the red 3 to become a 6 (not a 10 as you mentioned).

<div class="cArrow"> </div><div class="cContentInner">Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it). Also - the correction would be for the red 3 to become a 6 (not a 10 as you mentioned).</div>

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ChemPaths UW-Madison on 08 Sep 09

Thanks for following up on this. Apparently the Optical Character Recognition software missed the fact that this equation should be written with "SO4" not "SO2" anions - thus the original coefficient was correct. The sulfate subscripts have been changed and the original coefficient of "3" has been reinstated to its proper place. Thanks again.

<div class="cArrow"> </div><div class="cContentInner">Thanks for following up on this. Apparently the Optical Character Recognition software missed the fact that this equation should be written with "SO4" not "SO2" anions - thus the original coefficient was correct. The sulfate subscripts have been changed and the original coefficient of "3" has been reinstated to its proper place. Thanks again.</div>

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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 on 07 Sep 09
  
  Here's a moving visual: http://www.physchem.co.za/OB12-ele/Graphics/wavetrain.gif
  
  <div class="cArrow"> </div><div class="cContentInner">Here's a moving visual: <a href="http://www.physchem.co.za/OB12-ele/Graphics/wavetrain.gif" rel="nofollow" target="_blank">http://www.physchem.co.za/OB12-ele/Graphics/wavetrain.gif</a></div>
  
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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 on 07 Sep 09
  
  I wonder if this is how Helium gas is industrially manufactured
  
  <div class="cArrow"> </div><div class="cContentInner">I wonder if this is how Helium gas is industrially manufactured</div>
  
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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 on 06 Sep 09
  
  typo: "involving"
  
  <div class="cArrow"> </div><div class="cContentInner">typo: "involving"</div>
  
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ChemPaths UW-Madison on 07 Sep 09

Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it).

<div class="cArrow"> </div><div class="cContentInner">Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it).</div>

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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 on 06 Sep 09
  
  Images are missing
  
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ChemPaths UW-Madison on 07 Sep 09

Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it).

<div class="cArrow"> </div><div class="cContentInner">Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it).</div>

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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 on 06 Sep 09
  
  "CO2" instead of "C2O"
  
  <div class="cArrow"> </div><div class="cContentInner">"CO2" instead of "C2O"</div>
  
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ChemPaths UW-Madison on 07 Sep 09

Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it).

<div class="cArrow"> </div><div class="cContentInner">Thanks! This has been fixed - as such this highlight may not show up anymore (the text of the highlight has been changed, so Diigo won't be able to find it).</div>

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Measurement of Atomic Weights - 0 views

chemed.chem.wisc.edu/...nt-of-Atomic-Weights-1218.html

shared by Michael Boykin on 04 Sep 09 - Cached

Introduction - 0 views

chemed.chem.wisc.edu/...Chemistry_in_Geology-1219.html

shared by John Moore on 02 Sep 09 - Cached

- John Moore on 02 Sep 09
  
  This is interesting. I did not know there was an earth scientist's periodic table.
  
  <div class="cArrow"> </div><div class="cContentInner">This is interesting. I did not know there was an earth scientist's periodic table.</div>
  
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Chemistry Moodle Site - 0 views

courses.chem.wisc.edu

chemistry uw-madison

shared by ChemPaths UW-Madison on 28 Aug 09 - Cached

ChemPaths UW-Madison on 28 Aug 09

This is the Chemistry Moodle Site for Chem 109H.

<div class="cArrow"> </div><div class="cContentInner">This is the Chemistry Moodle Site for Chem 109H.</div>

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ChemPaths: Learning to Meander - 0 views

chemed.chem.wisc.edu/chempathsInstructor

online textbook chemistry general chemistry

shared by ChemPaths UW-Madison on 28 Aug 09 - No Cached

ChemPaths UW-Madison on 28 Aug 09

Course Textbook

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Open Forum - 4 views

All students can use this forum to discuss, announce study sessions, share questions, or anything you think of. Feel free to make other forums.

chemistry discussion

started by ChemPaths UW-Madison on 28 Aug 09 no follow-up yet

Chem 109H Fall 2009

pH and pOH - 1 views

The Rate Equation - 2 views

Reaction Mechanisms - 3 views

Chemistry 2009 - 2 views

Properties of Alkanes - 0 views

Internet Explorer 8: Home page - 0 views

The Covalent Bond - 0 views

Precipitation Reactions and Solubility - 0 views

Balancing Chemical Equations - 0 views

The Nature of Electromagnetic Radiation - 0 views

Atomic Structure and Isotopes - 0 views

Using Chemical Equations in Calculations - 0 views

Equations and Mass Relationships - 0 views

Analysis of Compounds - 0 views

Measurement of Atomic Weights - 0 views

Introduction - 0 views

Chemistry Moodle Site - 0 views

ChemPaths: Learning to Meander - 0 views

Open Forum - 4 views

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