Quantities and Reactions : Titrations

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

Lab Summary:

Titration is an essential process in chemistry. In this lab, you will use a Chemistry Sensor with pH electrode and a Drop Counter to titrate a hydrochloric acid solution of unknown concentration with a sodium hydroxide solution of known concentration. You will use your data and the stoichiometry of the reaction to determine the concentration of the hydrochloric acid solution.

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(student version)

Method:

Use a pH sensor and drop counter to titrate a hydrochloric acid solution of unknown concentration with a sodium hydroxide solution of known concentration. Use the data and the stoichiometry of the reaction to determine the concentration of the hydrochloric acid solution.

Here's What You Need:

Probeware

• PASPORT Chemistry Sensor (PS-2170)
• PASPORT Drop Counter (PS-2117)
• Xplorer GLX Graphing Datalogger (PS-2002)

Other Materials

• Small Tripod Base & Rod (SE-9451)
• Buret Clamp (SE-9446)
• Right angle clamp (SE-9444)
• Magnetic Stirrer (SE-7700)
• Beaker, 250-mL
• Buret, 50-mL
• Graduated cylinder, 100-mL
• Pipet with bulb, 10-mL
• Wash bottle and Waste container
• 0.1 M sodium hydroxide, NaOH
• Hydrochloric Acid (HCl), unknown concentration
• water, distilled

Lab Manual:

This activity is included in Chemistry with the Xplorer GLX (PS-2819A), complete with Teacher Information pages, student instructions and handouts, and sample data for a total of 19 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.