View from your playlist
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Learning Goals
- Explain that a polyprotic acid dissociates in a stepwise manner.
- Describe and write the equations representing the dissociation of a polyprotic acid.
- Compare the Ka’s for typical weak polyprotic acids.
- Know that the first dissociation is most important in determining pH for a typical polyprotic acid (in water).
- Know that the dissociation of sulfuric acid is unique because,
- the first deprotonation makes it a STRONG acid (occurs 100%)
- the second deprotonation has a realtively large Ka.
- the second deprotonation contributes to pH in dilute solutions.
Agenda
- Bell Ringer
- You need sit with your acidic partner.
- You need your lab composition book.
- Watch the video (also from your playlist) to see how to define percent dissociation again.
- Ummm... https://www.youtube.com/watch?v=dencuBNp_Ck
- Housekeeping
- Lab tomorrow.
- Paper Towels - Monday
- M.O.M. demonstration - did you forget to post?
- Due today.
- Did you include:
- Topics
- Correct formulas
- Net ionic equations
- Example
- Notes - Percent Dissociation, Polyprotic Acids
- Pre-Lab - Ka by Half-Titration
- Submitting/Completing pre-lab
- Scoring
- Work Day
- Quiz
Big Ideas
- Big Idea 3: Changes in matter involve the rearrangement and/or reorganization of atoms and/or the transfer of electrons.
- Big Idea 6: Any bond or intermolecular attraction that can be formed can be broken. These two processes are in a dynamic competition, sensitive to initial conditions and external perturbations.
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