Kinetics and Equilibrium : Le Chatelier's Principle

Determine how a reversible reaction in equilibrium responds to changes in chemical concentrations.

Lab Summary:

In this exploration, students will use a pH sensor to investigate chemical equilibrium and how equilibrium shifts when a stress is applied.

Download Free Lab  (PDF, 336 KB)

(student version)

Method:

Use a pH Sensor to investigate chemical equilibrium and shifts in an equilibrium when a stress is applied.

Here's What You Need:

Probeware

• PASPORT pH Sensor (PS-2102)
• Xplorer GLX Graphing Datalogger (PS-2002)
  (or alternate PASPORT interface -- see other options)

Other Materials

• Beaker, 150 mL
• Graduated cylinder, 25 mL
• Wash bottle and waste container
• 0.1 M ammonia
• 0.5 M acetic acid, CH₃CO₂H
• 0.5 M sodium acetate, CH₃CO₂Na
• 1.0 M lead(II) nitrate, Pb(NO₃)₂

Lab Manual:

This activity is included in Explorations in Chemistry (PS-2808), complete with Teacher Information pages, student instructions and handouts, and sample data for a total of 25 probeware-based labs. For your convenience, we offer bundles which provide the probeware necessary for the activities in the manual. For more information on these resources and bundles, click here.