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.

Downloads

• Download Free Lab (PDF, 580 KB) (579 KB, .pdf)

  (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

U.S. Educator prices shown.

Probeware

PASPORT Colorimeter Sensor (PS-2121) - $119

Our PASPORT Colorimeter records all 4 wavelengths simultaneously--no need to guess at wavelength to get a quality measurement.

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PASPORT pH Sensor (PS-2102) - $79

The pH sensor has a wide measurement range of 0 to 14 pH and high resolution, 0.01 pH.

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PASPORT Temperature Sensor (PS-2125) - $30

The temperature Sensor is a durable stainless steel temperature sensor with a wide measureable range.

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PASPORT Turbidity Sensor (PS-2122) - $125

The Turbidity Sensor measures the turbidity level (cloudiness) of water in nephelometric turbidity units (NTU).

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Xplorer GLX (PS-2002) - $329

The Xplorer GLX is a data collection, graphing, and analysis tool designed for science students and educators.

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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.