Multiple Choice
Which of the following best explains what is occurring when bubbles form in a liquid during a chemical reaction?
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6. Chemical Quantities & Aqueous Reactions
Gas Evolution Equations
Multiple Choice
Which gas is responsible for the bubbles in soda and other soft drinks?
A
carbon dioxide (CO_2)
B
oxygen (O_2)
C
nitrogen (N_2)
D
hydrogen (H_2)
Verified step by step guidance1
Understand that the bubbles in soda and other soft drinks are caused by a gas that is dissolved under pressure and released when the pressure is reduced (such as when opening the bottle).
Recall that carbon dioxide (CO\_2) is commonly used in carbonated beverages because it dissolves well in water and forms carbonic acid, giving the drink its characteristic fizz and slight acidity.
Recognize that oxygen (O\_2), nitrogen (N\_2), and hydrogen (H\_2) are not typically used for carbonation because they do not dissolve as readily or produce the same sensory effects.
Identify that the gas responsible for the bubbles is carbon dioxide (CO\_2) due to its solubility and reaction with water in the beverage.
Conclude that the correct answer is carbon dioxide (CO\_2), which creates the effervescence or bubbles in soda and soft drinks.
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