pH, Indicators and Titration Curves
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Learning Goals
- Determine the Ka of an unknown acid.
Agenda
- Bell Ringer
- Get goggles and aprons.
- Go to lab and:
- hook up your Spark and pH probe
- get a 24-well plate and make sure you have three CLEAN AND DRY wells you can use for buffer solutions (I will explain in a minute).
- Choose an unknown from the set of vials at the front.
- Pre-lab at the bell.
- Post-lab
- Clean up responsibilities
- Write-up
- Pre-lab
- Pre-lab assessment
- Safety (...and your lab grade)
- Clean up responsibilities (...and your lab grade) - CLICK HERE
- Reminders
- How will you write up procedures for two trials on the same acid?
- How do you calibrate the pH sensor?
- How do you change the number of sig digs reported on the Spark to what you need (...and what do you need anyway?)?
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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