Asked by Ethan Barker on Sep 25, 2024
Verified
The calcium hydroxide experiment demonstrates that
A) there is a much lower concentration of O₂ in expired air than in atmospheric air.
B) there is a much higher concentration of CO₂ in expired air than in atmospheric air.
C) there is a much higher concentration of O₂ in expired air than in atmospheric air.
D) there is a much lower concentration of CO₂ in expired air than in atmospheric air.
E) the concentrations of CO₂ in expired air and atmospheric air are approximately equal.
Calcium Hydroxide Experiment
A scientific experiment typically involving the use of calcium hydroxide, a compound with formula Ca(OH)2, to explore its chemical properties or reactions.
CO₂
Carbon dioxide, a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is absorbed by plants in photosynthesis.
O₂
The molecular form of oxygen that is essential for respiration in most living organisms.
- Acquire insight into the bodily responses and mechanisms associated with respiratory acidosis and alkalosis.
Verified Answer
NM
Nicholas Manziuk3 days ago
Final Answer :
B
Explanation :
Calcium hydroxide is used as a chemical indicator to determine the presence of carbon dioxide (CO₂) in expired air as it reacts with CO₂ to form calcium carbonate. Thus, if the calcium hydroxide turns milky, it indicates a high concentration of CO₂ in expired air compared to atmospheric air. Therefore, the correct choice is B.
Learning Objectives
- Acquire insight into the bodily responses and mechanisms associated with respiratory acidosis and alkalosis.