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When electrodes are immersed in water and electricity is passed, the bubbles formed on the positive terminal is actually _______ gas.
- a)Hydrogen
- b)Carbon dioxide
- c)Oxygen
- d)Nitrogen
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
When electrodes are immersed in water and electricity is passed, the b...
When electrodes are immersed in water and electricity is passed through it, water undergoes electrolysis. The water molecules are split into hydrogen and oxygen gases. The hydrogen gas is released at the negative terminal (cathode), and the oxygen gas is released at the positive terminal (anode). Therefore, the bubbles formed on the positive terminal are oxygen gas.
Most Upvoted Answer
When electrodes are immersed in water and electricity is passed, the b...
Electrolysis of Water
When electrodes are immersed in water and electricity is passed through it, a process called electrolysis occurs. This process involves the decomposition of water (H2O) into its constituent elements.
Understanding the Electrolysis Process
- Electrodes: There are two electrodes used—an anode (positive terminal) and a cathode (negative terminal).
- Chemical Reaction: At the anode, oxidation occurs, while at the cathode, reduction takes place.
Gas Formation
- At the Anode (Positive Terminal): Water molecules lose electrons, leading to the formation of oxygen gas. The reaction can be summarized as:
- 2H2O → O2 + 4H+ + 4e−
- At the Cathode (Negative Terminal): Reduction occurs, producing hydrogen gas:
- 2H2O + 2e− → H2 + 2OH−
Conclusion
Thus, when you observe bubbles forming at the positive terminal (anode), the gas being released is indeed oxygen (Option C). The hydrogen gas forms at the negative terminal. This electrochemical reaction is fundamental in understanding both basic chemistry and various applications, including water splitting for generating hydrogen fuel.
Understanding this distinction between the gases produced at the electrodes is vital for studies related to electrochemistry, environmental science, and energy resources.
When electrodes are immersed in water and electricity is passed through it, a process called electrolysis occurs. This process involves the decomposition of water (H2O) into its constituent elements.
Understanding the Electrolysis Process
- Electrodes: There are two electrodes used—an anode (positive terminal) and a cathode (negative terminal).
- Chemical Reaction: At the anode, oxidation occurs, while at the cathode, reduction takes place.
Gas Formation
- At the Anode (Positive Terminal): Water molecules lose electrons, leading to the formation of oxygen gas. The reaction can be summarized as:
- 2H2O → O2 + 4H+ + 4e−
- At the Cathode (Negative Terminal): Reduction occurs, producing hydrogen gas:
- 2H2O + 2e− → H2 + 2OH−
Conclusion
Thus, when you observe bubbles forming at the positive terminal (anode), the gas being released is indeed oxygen (Option C). The hydrogen gas forms at the negative terminal. This electrochemical reaction is fundamental in understanding both basic chemistry and various applications, including water splitting for generating hydrogen fuel.
Understanding this distinction between the gases produced at the electrodes is vital for studies related to electrochemistry, environmental science, and energy resources.
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