Editing Acid Base Titration Lab Questions
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Answer the following questions on a separate section in your lab notebook.<br> <br> <br> 1. Explain the proper way of cleaning a buret to be used in a titration.<br> <br> 2. For each titration you performed:<br> 2a. On the graph of the pH curve, draw dotted lines to show what the pH is at the equivalence point (all trials) and the half-way point <b>(only for weak acid/base)</b>.<br> 2b. Using your graph information, determine the Ka / Kb of the weak acid/base.<br> 2c. Using your lab information, calculate the theoretical pH at the equivalence point.<br> <br> 3. On the pH curve of the strong acid and base, draw (in pencil) the pH curve of two weak acid and two weak base:<br> 3a. You will calculate the pH of the initial weak acid/base solution (before titration) assuming that the concentration are the same as the strong acid/base.<br> 3b. The second point you calculated will be at the half-way point.<br> 3c. The rest of the pH curve you will guesstimate using your knowledge of pH curves.<br> 3d. Use the acid ionization and base dissociation equilibrium constant values from the chapter of AP book or at end of AP book.<br> <br> 4. After you make your updated pH curves of weak and strong acids, where there are areas that were common to strong and weak acids?<br> <br> 5. Using each the weak acid or weak base pH curves, separate the curves into 3 distinct areas and explain what are the main species in the bucket at each point and how does that explain the calculation you are doing to determine the pH/pOH of the solution.<br> <br> <br> <br>
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