Featured in PASCO’s Chemistry through Inquiry Teacher Guide
Features over 25 inquiry based labs covering the fundamental concepts of lab skills, structure & properties of matter, chemical reactions and more.
Percent Oxygen in the Air
Use an absolute pressure sensor to learn about the components of air and how to determine the percent of oxygen in air.
Students learn about the components of air and how to determine the percent of oxygen in air. Through this investigation, students:
- Observe a chemical reaction involving different states of matter.
- Describe pressure at the molecular level.
- Explain how the variables temperature, volume, and concentration affect the pressure of gases.
Students gain experience conducting the following procedures:
- Use an absolute pressure sensor to measure changes in pressure as atmospheric oxygen reacts with steel wool (iron).
- Determine the percent of oxygen in air from the measured pressure difference.
Sensors / Equipment Used:
PASPORT Chemistry Sensor
Allows students to measure Temperature, pH/ISE/ORP, Absolute Pressure & Voltage in one sensor. For use with PASPORT Interfaces.
PASPORT Sensor Extension Cable
Allows an additional two meter length extension on all PASPORT sensors.
Test tube, 25-mm × 150-mm
One-hole rubber stopper to fit test tubes
White vinegar (~5% acetic acid) - 50 to 60 mL
Steel wool, fine mesh (#000) - 1 g
Paper towels - As needed
Glycerin - 2 drops
Your Bundle Options:
A sensor bundle specifically designed to get you started using probeware in your chemistry lab. Also: perform 22 Lab Activities from Chemistry through Inquiry teacher guide.
Contains the sensors and probes needed to perform all 17 experiments in the Advanced Chemistry Teacher Guide and all 25 labs in the Chemistry through Inquiry Guide.