Education Technology

Vernier - Acid-Base Titration

Activity Overview

In this lesson, students will use a pH sensor to monitor the pH of a solution and determine the equivalence point.


  • Use a pH Sensor to monitor changes in pH as sodium hydroxide solution is added to a hydrochloric acid solution.
  • Plot a graph of pH vs. volume of sodium hydroxide solution added.
  • Use the graph to determine the equivalence point of the titration.
  • Use the results to calculate the concentration of the hydrochloric acid solution.

About the Lesson

In this experiment, you will use a pH Sensor to monitor pH as you titrate. The region of most rapid pH change will then be used to determine the equivalence point. The volume of NaOH titrant used at the equivalence point will be used to determine the molarity of the HCl.