Chapter 17: Problem 163
\(\mathrm{KO}_{2}\) (potassium super oxide) is used in oxygen cylinders in space and submarines because it [2002] (a) produces ozone (b) absorbs \(\mathrm{CO}_{2}\) (c) absorbs \(\mathrm{CO}_{2}\) and increase \(\mathrm{O}_{2}\) contents (d) eliminates moisture
Short Answer
Expert verified
(c) absorbs \(\mathrm{CO}_2\) and increase \(\mathrm{O}_2\) contents
Step by step solution
01
Understanding the Problem
The problem is asking why potassium superoxide, \(\mathrm{KO}_{2}\), is used in oxygen cylinders for spaces and submarines. The options given hint at chemical reactions involving gases.
02
Chemical Properties of \(\mathrm{KO}_2\)
Potassium superoxide \(\mathrm{KO}_{2}\) is known to react with carbon dioxide \(\mathrm{CO}_2\) to form potassium carbonate \(\mathrm{K}_{2}\mathrm{CO}_3\) and oxygen \(\mathrm{O}_2\). This is a crucial feature for enclosed environments where both oxygen generation and carbon dioxide absorption are necessary.
03
Reaction Equation
The specific chemical reaction for \(\mathrm{KO}_2\) is: \[ 4\mathrm{KO}_2 + 2\mathrm{CO}_2 \rightarrow 2\mathrm{K}_2\mathrm{CO}_3 + 3\mathrm{O}_2 \]This reaction shows that \(\mathrm{CO}_2\) is absorbed and \(\mathrm{O}_2\) is produced.
04
Evaluate Options
Based on the reaction, \(\mathrm{KO}_2\) does not produce ozone \(\mathrm{O}_3\) (option a), absorb \(\mathrm{CO}_2\) and increase \(\mathrm{O}_2\) contents (option c), or eliminate moisture (option d). Thus, \(\mathrm{KO}_2\) provides a dual benefit by absorbing \(\mathrm{CO}_2\) and producing oxygen, corresponding to option (c).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Oxygen Generation
Potassium superoxide (\(\mathrm{KO}_2\)) is a fascinating compound due to its ability to generate oxygen efficiently. It plays a vital role in situations where breathable air is required but regular airflow is restricted, such as in space or underwater environments. When \(\mathrm{KO}_2\) comes into contact with moisture, a reaction occurs that produces oxygen. This process is crucial for maintaining life-supporting oxygen levels in enclosed settings like space shuttles and submarines. Understanding how \(\mathrm{KO}_2\) generates oxygen involves its interaction with carbon dioxide (\(\mathrm{CO}_2\)). During the chemical reaction, \(\mathrm{KO}_2\) gives up oxygen molecules as it reacts with \(\mathrm{CO}_2\). This results in the formation of potassium carbonate (\(\mathrm{K}_2\mathrm{CO}_3\)) and oxygen (\(\mathrm{O}_2\)). The equation below illustrates the reaction:\[4\mathrm{KO}_2 + 2\mathrm{CO}_2 \rightarrow 2\mathrm{K}_2\mathrm{CO}_3 + 3\mathrm{O}_2\]Through this reaction, \(\mathrm{KO}_2\) helps maintain an adequate supply of oxygen, which is indispensable for survival in isolated and confined environments.
Carbon Dioxide Absorption
Another crucial function of potassium superoxide (\(\mathrm{KO}_2\)) is its ability to absorb carbon dioxide (\(\mathrm{CO}_2\)). This property is particularly essential in enclosed spaces where \(\mathrm{CO}_2\) can build up rapidly due to human respiration. In submarines and space capsules, where exchanging air with the external environment is not possible, controlling \(\mathrm{CO}_2\) levels is critical for the health and safety of the occupants. When \(\mathrm{KO}_2\) reacts with \(\mathrm{CO}_2\), the carbon dioxide is effectively absorbed, forming solid byproducts like potassium carbonate (\(\mathrm{K}_2\mathrm{CO}_3\)). This process reduces the concentration of \(\mathrm{CO}_2\) in the air, preventing the adverse effects of its accumulation, such as dizziness, suffocation, and other health risks.
- Enhances air quality by reducing \(\mathrm{CO}_2\) concentration.
- Prevents health issues associated with elevated \(\mathrm{CO}_2\) exposure.
Chemical Reactions in Enclosed Spaces
In enclosed spaces such as submarines and space stations, the chemical reactions involving potassium superoxide (\(\mathrm{KO}_2\)) play a pivotal role in maintaining a breathable atmosphere. Such environments demand meticulous control over air composition, as there's no free exchange with the outside air. The ability of \(\mathrm{KO}_2\) to release oxygen and absorb carbon dioxide makes it especially suited for these environments.
Advantages in Confined Environments:
- Generates oxygen consistently, ensuring a steady and adequate air supply.
- Absorbs carbon dioxide, which prevents it from reaching harmful levels.