Acid–base solutions – strong vs weak and measuring pH

ChemistryAcids, Bases & TitrationAges 16–17

Intro screen: choose Water, Strong acid, Weak acid, Strong base or Weak base (fixed concentration 0.100 M) to compare them. My Solution screen: build your own acid or base, strong or weak, and adjust its strength (Ka, Kb via pKa/pKb) and initial concentration. See the proportion of undissociated molecules and ions in the solution and a log-scale graph of equilibrium concentrations, then test with a pH meter, pH paper or a conductivity tester. Adapted from the "Acid-Base Solutions" simulation by PhET Interactive Simulations, University of Colorado Boulder (CC BY 4.0); rewritten.

Lesson: Acids, bases and pH