In this experiment, how will you recognize when a chemical reaction between hydrogen peroxide and catalase is occurring?
A The consumption of hydrogen peroxide will decrease the contents of the test tube.
B The production of water will increase the volume of the test tube.
C The production of oxygen will cause bubbling in the test tube.
The correct answer and explanation is:
It looks like you’re asking about the effects of gas production in a test tube, specifically water and oxygen, and how they affect the volume and bubbling.
Correct Answer:
C. The production of oxygen will cause bubbling in the test tube.
Explanation:
When a chemical reaction produces a gas, it often causes bubbling or effervescence in a liquid because gas forms bubbles that rise through the liquid and escape into the air. In this case, the gas in question is oxygen (O₂). Oxygen gas is insoluble in water under normal conditions, so when it is produced inside a test tube containing a liquid, it forms bubbles that you can see rising and escaping.
Why oxygen causes bubbling:
- Gas formation: During certain chemical reactions, such as the decomposition of hydrogen peroxide (H₂O₂) catalyzed by manganese dioxide or catalase enzyme, oxygen gas is released as a product.
- Gas volume: The oxygen molecules occupy space as a gas, and as they accumulate, they push through the liquid, forming visible bubbles.
- Bubbling effect: These bubbles rise to the surface of the liquid and escape, making bubbling a clear indicator of oxygen production.
Why water production will not cause bubbling or increase volume visibly:
- Water is a liquid: Water is a liquid product, so it won’t form gas bubbles. Instead, it would just mix with the existing liquid in the test tube.
- Volume changes: The production of water might slightly increase the total volume of liquid in the test tube, but this change is usually minimal and hard to observe without precise measuring equipment.
- No bubbling: Because water is liquid, it doesn’t cause bubbling or effervescence.
Summary:
- Oxygen gas production causes bubbling because it forms gas bubbles in the liquid.
- Water production increases liquid volume slightly but does not cause bubbling.
- Bubbling is a practical and visual sign of oxygen gas evolution in experiments.