Chemistry 0620 · IGCSE · Electrolysis

Electrolysis — practice question

Concentrated aqueous potassium chloride is electrolysed with platinum electrodes. The solution includes the ions $\text{K}^+$, $\text{Cl}^-$, $\text{H}^+$ and $\text{OH}^-$. During this electrolysis, which electrodes are these ions attracted to?

  • Aanode: $\text{Cl}^-$ and $\text{K}^+$; cathode: $\text{H}^+$ and $\text{OH}^-$
  • Banode: $\text{Cl}^-$ and $\text{OH}^-$; cathode: $\text{H}^+$ and $\text{K}^+$
  • Canode: $\text{H}^+$ and $\text{K}^+$; cathode: $\text{Cl}^-$ and $\text{OH}^-$
  • Danode: $\text{H}^+$ and $\text{OH}^-$; cathode: $\text{Cl}^-$ and $\text{K}^+$

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