Which of the following half-equations correctly represents the reaction at the anode during the electrolysis of concentrated sodium chloride solution?

Question

Accepted Answer

$2Cl^- \rightarrow Cl_2 + 2e^-$. At the anode, oxidation occurs. In concentrated sodium chloride solution, chloride ions (Cl⁻) are present in high concentration and are preferentially discharged over hydroxide ions, producing chlorine gas: 2Cl⁻ → Cl₂ + 2e⁻. Option C would occur if the solution were dilute, while D and A represent c

Answer

A) $Na^+ + e^- \rightarrow Na$

Answer

B) $2Cl^- \rightarrow Cl_2 + 2e^-$

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C) $2H_2O \rightarrow O_2 + 4H^+ + 4e^-$

Answer

D) $2H^+ + 2e^- \rightarrow H_2$

Which of the following half-equations correctly represents the reaction at the anode during the electrolysis of concentrated sodium chloride solution?

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