Purpose
The student will describe the effects of carbon dioxide concentration on blood pH.
Materials
Willing subject (someone complete the activities of the experiment)
Timer (with a second hand)
Glass
Urinary and Salivary pH (litmus) paper
Drinking straw
Procedure
Measure 2 ounces of water in a glass. Obtain the pH of the water in the glass. Record the water pH prior to experiment.
Have the subject blow air through the straw into the water and keep blowing into the water for 2 minutes inhaling between exhalations. The subject should be breath as normal as possible while doing this activity. Measure and record the pH of the water in the glass.
Empty the water from the glass and refill it with fresh water. Have the subject do vigorous exercise for 5 minutes.
Immediately after exercise have the subject blow into the water for 2 minutes (inhaling between exhalations). Measure and record the pH of the water in the glass.
Empty the water from the glass and refill it with fresh water. Have the subject rest for 5 minutes.
Have the subject blow in the water for 2 minutes (inhaling between exhalations). Measure and record the pH of the water in the glass.
Results
Answers to your experiment questions will comprise the Analysis / Data section of your lab report.
