AP Chemistrymediummcq1 pt
Which statement about electrolysis of water is correct?
A.H₂ forms at the cathode, O₂ at the anode
B.O₂ forms at the cathode, H₂ at the anode
C.Equal volumes of H₂ and O₂ form
D.Both gases form at both electrodes
Explanation
Core Concept
Reduction (H₂O + 2e⁻ → H₂ + 2OH⁻) occurs at the cathode; oxidation (2H₂O → O₂ + 4H⁺ + 4e⁻) at the anode. The gas volumes are 2:1 H₂:O₂.
Correct Answer
AH₂ forms at the cathode, O₂ at the anode
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