Quantities and Reactions : General Acid-Base Chemistry

Discover the concentration of an unknown acid solution using acid-base titration.

Lab Summary:

In this activity, students will use a pH sensor to investigate the titration process. Students will use a titrant of a known concentration of sodium hydroxide solution to determine the concentration of an unknown hydrochloric acid solution.

Download Free Lab  (PDF, 484 KB)

(student version)

Method:

Use a pH Sensor to quantify the changes that occur when an acid reacts with a base; titrate an unknown acid and determine the equivalence point from the titration curve.

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

• Small Tripod Base & Rod (SE-9451)
• Buret Clamp (SE-9446)
• Beaker, 250-mL
• Buret, 50-mL
• Graduated cylinder, 100-mL
• 0.1 M or 0.3 M hydrochloric acid, HCl
• Magnetic stirrer and stir bar
• Pipette with bulb, 10-mL
• 0.10 M sodium hydroxide, NaOH
• Wash bottle and waste container
• Water, distilled

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.