Essential Chemistry for IGCSE - Electricity And Chemistry (Section 5 - No. 33)
Which of the following is the correct half-equation for the reaction at the cathode during the electrolysis of molten NaCl?
2Cl- -> Cl2 + 2e-
Na+ + e- -> Na
2Na + 2e- -> 2Na+
Cl2 + 2e- -> 2Cl-
Explanation
At the cathode, sodium ions gain an electron and form sodium metal.
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