01/19/16 - 1/2 and 3/4 AP Chem - U9 pH, Strong Acids/Weak Acids

Today's Featured Video


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Learning Goals 
  1. Given any of the four pH, pOH, [H+]  [OH-], calculate the other three WITH OR WITHOUT a graphing/programmed calculator. 
  2. Explain why the [H+] of a strong acid solution comes from the initial  concentration of the acid while the [H+] of a weak acid solution requires an equilibrium calculation.
  3. Write the Ka expressions for weak acids using correct symbols for all quantities.
  4. Solve “RICEE” problems involving acid equilibria.
  5. Correctly use the “x is small enough to ignore” approximation when appropriate.

Agenda
  1. Bell Ringer
    1. Make sure you are enrolled in your Google Classroom course.
    2. Review your calendar for the week so you know what is coming up.
    3. Watch the featured video from your playlist if you have not done so already.
  2. Housekeeping
    1. AP Syllabus
      1. Assessment Plan
        1. Percentages
        2. Hard deadlines
        3. Lab Safety/Techniques
        4. Lab Prep
        5. Redos
      2. Safety/Syllabus Agreement
    2. Paper Towels
    3. Preparing for class
  3. Feedback from HW 2 Posting
  4. Topic: U9 pH, Strong Acids/Weak Acids
    1. Notes/Feedback
      1. pH or [H+]?  Use correct symbols.
      2. Draw conclusions
      3. Sig digs
      4. Variety of equations
      5. Calculator help
    2. Info sheets
    3. Practice Problems

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.