Quantities and Reactions : Evidence of Reactions

Investigate several chemical reactions, using different methods to look for evidence of chemical change.

Lab Summary:

This exploration includes four different experiments, each providing the students experience with one of the four types of evidence for chemical change: temperature change, color change, gas evolution and formation of a precipitate.

Download Free Lab  (PDF, 580 KB)

(student version)

Method:

Use the Temperature Sensor, Colorimeter, pH Sensor, and Turbidity Sensor, to investigate various substances and look at the evidence of a chemical reaction.

Here's What You Need:

Probeware

• PASPORT Colorimeter with cuvettes (PS-2121)
• PASPORT pH Sensor (PS-2102)
• PASPORT Temperature Sensor (PS-2125)
• PASPORT Turbidity Sensor with cuvettes (PS-2122)
• Xplorer GLX Graphing Datalogger (PS-2002)
  (or alternate PASPORT interface -- see other options)

Other Materials

• Balance
• Test tube, medium (2)
• Test tube, small (2)
• Wash bottle and waste container
• Water
• Sodium hydroxide, NaOH
• Sodium chloride, NaCL
• Sodium bicarbonate, Na₂CO₃
• 0.5 M copper(II) nitrate, CU(NO₃)₂
• 1.0 M potassium thiocyanate, KSCN
• Vinegar
• 0.01 M copper(II) sulfate, CUSO₄
• 0.02 M copper(II) sulfate, CUSO₄
• 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./p>