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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman"">I’ve received a few questions today about some questions on MT2.<span style="mso-spacerun:yes">
</span>I will cover them<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman"">during the review tomorrow.<span style="mso-spacerun:yes">
</span>I sent the following out after the MT2 questions were<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman"">released.<span style="mso-spacerun:yes">
</span>I addressed the questions in that e-mail because a lot of people missed<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman"">these questions.<span style="mso-spacerun:yes">
</span>I didn’t show work for the first one below because I had done a<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman"">very similar problem in lecture.<span style="mso-spacerun:yes">
</span>I will go over the one specifically tomorrow.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman"">Dr. Zellmer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman""><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Calibri">From:</span></b><span style="mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Calibri"> Zellmer, Robert <zellmer.1@osu.edu>
<br>
<b>Sent:</b> Thursday, March 30, 2023 10:23 AM<br>
<b>To:</b> cbc-chem1220@groups.asc.ohio-state.edu<br>
<b>Cc:</b> cbc-chem1220-ta@groups.asc.ohio-state.edu<br>
<b>Subject:</b> MT2 - questions released<o:p></o:p></span></p>
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</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman"">The questions for MT2 have been released.<span style="mso-spacerun:yes">
</span>The following questions seemed to pose<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman"">the most problems for most people in all 1220 sections.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-bidi-font-family:"Times New Roman""><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">A 1.00 L flask is filled with 1.84 mol HF(<i>g</i>) and sealed.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">Determine the concentration (in
<i>M</i>) of HF(<i>g</i>) when the reaction reaches equilibrium.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">H2 (<i>g</i>) + F2 (<i>g</i>)
</span></b><b><span style="font-family:"Cambria Math",serif;mso-fareast-font-family:HiraginoSans-W3;mso-bidi-font-family:"Cambria Math";color:#282828">⇌</span></b><b><span style="font-family:"Arial",sans-serif;mso-fareast-font-family:HiraginoSans-W3;color:#282828">
</span></b><b><span style="font-family:"Arial",sans-serif;color:#282828">2 HF(<i>g</i>)
<i>K </i>= 111<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">Round your answer to TWO decimal places (i.e. 2.37) and do NOT include any units.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">I did a problem like this in lecture, where I had A2 + B2 <=><span style="mso-spacerun:yes">
</span>2 AB and it was<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">started with product and went in the reverse direction.<span style="mso-spacerun:yes">
</span>End-of-chapter<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">exercises 15.56 is like this question.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">186.0 mL of 0.012
<i>M </i>Ca(OH)2 is combined with 290.0 mL of 0.035 <i>M </i>HCl. What is the<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">pH of the combined solution?<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">Round your answer to TWO decimal places (i.e. 2.37) and do NOT include any units.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">The volumes for the base and acid varied.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">This is a neutralization problem between a strong base and strong acid.<span style="mso-spacerun:yes">
</span>This is<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">similar to problems from 1210 and EOCE 16.100.<span style="mso-spacerun:yes">
</span>You could have set up a BCA<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">table (ICC table as I call them) to figure out which was in excess (the HCl) and the<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">moles of excess substance (HCl) and then its conc in the final total volume and<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">the pH.
<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">You could have also treated it as a titration and you would find there’s excess HCl.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">Then you could take the volume of excess HCl and it’s original conc. and done a<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">dilution problem to figure out the conc. of HCl in the final volume and then the pH.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">In any case, I think the major mistake most people made was not accounting for<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">the fact the are 2 OH- in one Ca(OH)2.<span style="mso-spacerun:yes">
</span>The conc. of OH- is twice the conc of the<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">Ca(OH)2, 0.024 M in OH-.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">Sulfuric acid, H2SO4 , is a strong acid for loss of the first proton and a weak acid<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">(<i>K
</i>= 1.2 × 10^-2 ) for loss of the second proton (HSO4^-). In a solution of sulfuric<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">acid, which of following correctly arranges the concentrations of H2SO4 , HSO4^- ,<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">SO4^2- , and H3O+ in order from highest concentration to lowest concentration?<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">When I saw this question I knew it would be challenging, but not impossible.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">H2SO4 is a strong acid and thus completely ionizes.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">H2SO4<span style="mso-spacerun:yes">
</span>+<span style="mso-spacerun:yes"> </span>H2O<span style="mso-spacerun:yes">
</span>---><span style="mso-spacerun:yes"> </span>H3O^+<span style="mso-spacerun:yes">
</span>+<span style="mso-spacerun:yes"> </span>HSO4^-<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">So, there’s essentially no H2SO4 left in solution.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">The HSO4^- is a weak acid and thus doesn’t completely ionize.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">HSO4^-<span style="mso-spacerun:yes">
</span>+<span style="mso-spacerun:yes"> </span>H2O<span style="mso-spacerun:yes">
</span><=><span style="mso-spacerun:yes"> </span>H3O^+<span style="mso-spacerun:yes">
</span>+<span style="mso-spacerun:yes"> </span>SO4^2-<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">Even though it is a relatively strong weak acid (Ka = 1.2 x 10^-2), it mostly<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">remains as HSO4^- with a small amount of SO4^2- (less than the equil.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">conc of HSO4^-).
<span style="mso-spacerun:yes"> </span>It also produces some more H3O^+ which adds to the<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">H3O^+ from the first ionization step.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">Thus, the conc should be in the order,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">[H3O+] > [HSO4^-] > [SO4^2-] > [H2SO4]<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">Phosphoric acid is a triprotic acid with the following acid dissociation constants:<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><i><span style="font-family:"Arial",sans-serif;color:#282828">Ka1
</span></i></b><b><span style="font-family:"Arial",sans-serif;color:#282828">= 7.5 × 10^-3 ,
<i>Ka2 </i>= 6.2 × 10^-8 , <i>Ka3 </i>= 4.2 × 10^-13 .<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">What is the base dissociation constant for H2PO4^- ?<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">H2PO4^- is amphoteric (amphiprotic), it can act as an acid or a base.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">Acting as an acid,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">H2PO4^-<span style="mso-spacerun:yes">
</span><=><span style="mso-spacerun:yes"> </span>H+<span style="mso-spacerun:yes">
</span>+<span style="mso-spacerun:yes"> </span>HPO4^2-<span style="mso-tab-count:1">
</span>Ka2 = 6.2 × 10^-8<span style="mso-spacerun:yes"> </span><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">Acting as a base,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">H2PO4^-<span style="mso-spacerun:yes">
</span>+<span style="mso-spacerun:yes"> </span>H2O<span style="mso-spacerun:yes">
</span><=><span style="mso-spacerun:yes"> </span>H3PO4<span style="mso-spacerun:yes">
</span>+<span style="mso-spacerun:yes"> </span>OH-<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">To get the Kb for H2PO4^- acting as a base you need the Ka for its conjugate<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">acid, H3PO4,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><span style="mso-spacerun:yes">
</span>Kw<span style="mso-spacerun:yes"> </span>1.0 x 10^-14<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">Kb = --------<span style="mso-spacerun:yes">
</span>=<span style="mso-spacerun:yes"> </span>-------------------<span style="mso-spacerun:yes">
</span>= 1.3 x 10^-12<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><span style="mso-spacerun:yes">
</span>Ka1<span style="mso-spacerun:yes"> </span>7.5 × 10^-3<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">All the above scored less than 40% across all the 1220 sections.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">The following scored around 54%.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">What is the pH after 40.0 mL of 0.200 M HCl has been added to 200.00 mL of<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">a buffer solution consisting of 0.20 M CH3NH2 and 0.15 M of (CH3NH3)Cl?<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><b><span style="font-family:"Arial",sans-serif;color:#282828">(<i>Kb
</i>of CH3NH2 = 4.4 × 10^-4 ).<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">I did a problem similar to this for an NH3/NH4Cl buffer system adding NaOH<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">in lecture.<span style="mso-spacerun:yes">
</span>There was a similar question on Quiz 7 for adding HCl to an<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">acidic buffer system of HX/X- given the Ka for HX.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828">Dr. Zellmer<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-layout-grid-align:none;text-autospace:none"><span style="font-family:"Arial",sans-serif;color:#282828"><o:p> </o:p></span></p>
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