When an aqueous solution of NaCl is electrolyzed:
Correct answer: B. H₂ is evolved at the cathode
- A. Cl₂ is evolved at the cathode
- B. H₂ is evolved at the cathode
- C. Na is deposited at the cathode
- D. Na appears at the anode
Explanation
H₂ is produced at the cathode due to the reduction of H₂O instead of Na⁺.
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Electrochemistry describes electron transfer through oxidation and reduction, identifies oxidizing and reducing agents, and applies oxidation numbers to balance redox equations. It also covers electrode potential and the standard hydrogen electrode, which provides the reference for comparing the reduction tendencies of other electrodes.
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