Use a pH sensor to test the pH of a set of serial dilutions and make a connection between the pH value (& pOH) of a solution and its hydrogen ion (& hydroxide ion) concentration.
Supports PASCO's Chemistry Starter Lab Station:
pasco.com/product/ec-6362
and Chemistry Extension Lab Station:
pasco.com/product/eb-6363
Find this activity's free student and teacher files here in PASCO's Experiment Library:
www.pasco.com/resources/lab-experiments/618