Lab-Aids: Investigating Human Respiration Kit
Students explore the role of the respiratory system in the regulation of gases in the blood. Students qualitatively investigate the use of bromthymol blue (BTB) as an indicator. They then quantitatively measure the amount of carbon dioxide in their exhaled breath by using the indicator to perform a simple titration. Developed by SEPUP.
Content List:
- 24 plastic cups
- 4 dropper bottles of bromthymol blue (BTB) indicator
- 8 dropper bottles of 0.05 M sodium hydroxide
- 8 SEPUP trays
- 8 droppers
- 16 stir sticks
- 16 30-mL graduated cups
- 16 1-gallon plastic bags
- 18 straws
- 32 Student Worksheet and Guides
- 1 Teacher's Guide
Classroom Planning:
- 32 students
- To complete this kit requires one to two ~50-minute class periods.
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