Acids and Bases
Eleven topics on protons in solution. The pH of strong and weak acids and bases, how titration curves read, what molecular structure says about acid strength, comparing pH to pKa, and everything about buffers — their properties, the Henderson-Hasselbalch equation, capacity, and how pH drives solubility.
Equations For every problem in this unit
60 open-ended problems.
Read the question, work it out, then flip the card to compare your reasoning to the worked solution. Mark each card so you can return to the ones that still bite.
Switch to All, work through some cards, and tag them as Got it or Revisit.
Test the unit.
Twenty mixed items pulled from across all 11 topics. Identifies which misconceptions still bite when you cannot see which topic the question came from.
Check what stuck.
Units 1 through 8, drawn evenly so earlier units get the same share as this one. Twenty questions or a full 60-question section, your choice. Even coverage means this is a retention check rather than a score estimate.