Featured Video - Buffers
A video from your playlist.
A video from your playlist.
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Learning Goals
- Choose the acid/conjugate base (base/conjugate acid) needed to get a buffer of specified pH. (Given Ka’s or Kb’s.)
- Choose pairs of substances that will make a buffer:
- weak acid + conjugate base
- weak base + conjugate acid
- weak acid + SOME strong base
- weak base + SOME strong acid
- Explain buffering capacity based on the presence of the weak acid (H+ donor) and conjugate base (H+ acceptor).
- Show mathematically that diluting a buffer does not change the pH of the buffer, but it reduces its buffering capacity.
- Calculate the pH of the best buffer made from a given acid and its conjugate base given Ka’s of weak acids (or Kb’s of weak bases)
- Bell Ringer
- Pick up a copy of the U10 I Can list (2 pages, 1 is front/back).
- Watch/take notes on the video on buffers.
- Mini-Lab: Alka-selter
- Notes - Buffers
- Housekeeping
- Test Monday
- Inquiry Pre-lab for A/B Chem
- Inquiry lab - parts
- U10 Problem Sets
- Work Day - Inquiry Lab Prep
- A/B Titrations (Inquiry)
- Ksp determination (Inquiry)
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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