The electrolysis of sodium chloride solution
1 mark · NormalDuring the electrolysis of sodium chloride solution, why does the solution near the cathode become alkaline?
- A.Hydrogen gas dissolves to form alkali.
- B.Sodium ions react with water to make sodium hydroxide.
- C.Hydroxide ions are produced at the cathode.
- D.Chlorine neutralises acid at the cathode.
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Correct option: Hydroxide ions are produced at the cathode.
Also accept: OH- are produced at cathode
Common mistakes: Saying sodium ions react to form NaOH
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Marking points
B1 · 1 mark · Selects the correct answer: Hydroxide ions are produced at the cathode.
Worked solution
The correct answer is: Hydroxide ions are produced at the cathode.