Electrolysis: brine
Quiz by Oak National Academy: GCSE Combined Science OCR Higher
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6 questions
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- Q1What ions are present in a solution of brine?H⁺, OH⁻, Na⁺, Br⁻H⁺, OH⁻, Na⁺, Cl⁻H⁺, OH⁻, K⁺, Cl⁻30s
- Q2What is produced at the negative electrode during the electrolysis of brine?hydrogen gassodium hydroxidechlorine gas30s
- Q3What is the half-equation for the reaction at the anode during electrolysis of brine?2H⁺ + 2e⁻ → H₂2Cl⁻ → Cl₂ + 2e⁻Na⁺ + OH⁻ → NaOH30s
- Q4How can you test for hydrogen gas?Bleach litmus paper.Relight a glowing splint.Use pH paper.Perform a 'pop' test with a lit splint.30s
- Q5Why does the electrolyte become alkaline during the electrolysis of brine?because hydrogen ions are discharged at the cathodebecause chlorine ions are discharged at the anodebecause sodium hydroxide forms in the solution30s
- Q6Which of the following statements describes what happens during the electrolysis of brine?Users sort answers between categoriesSorting30s