Quantities and Reactions : Double Replacement

Use stoichiometry to determine the molar concentration of an acid solution by using it as an excess and a limiting reagent in a double replacement reaction.

Lab Summary:

In this exploration, students will use the an absolute pressure sensor, to determine the molar ratio of reactants in a double replacement reaction when one reactant is in excess and one reactant is limited.

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(student version)

Method:

Use an Absolute Pressure Sensor to determine the characteristics of double replacement reactions.

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

• Balance
• Erlenmeyer flask, 250-mL
• Rubber stopper, one-hole
• Graduated cylinder, 100-mL
• Wash bottle and waste container
• Sodium bicarbonate, NaHCO₃
• 0.5 M hydrochloric acid, HCl

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.