Question

What is name and formula of the new solution that is now present in the electrolytic vessel after the process is done?

Answer 1

The electrolytic vessel is then provided with a mixture of potassium hydroxide solution and bromine solution.

• In the electrolyte, potassium bromide dissociates to K⁺ and Br⁻ ions, while water is auto-ionized to H⁺ and OH⁻ ions.

• K⁺ and H⁺ ions migrate to the cathode. H⁺ ion is preferentially discharged to H₂ gas because H⁻ ion is reduced more readily than K⁺ ion.
• 2H⁺(aq) + 2e⁻ → H₂(g)
• Br⁻ and OH⁻ ions migrate to the anode. Br⁻ ion is preferentially discharged to Br₂ solution because Br⁻ ion is more concentrated than OH⁻ ion.
• 2Br⁻(aq) → Br₂(aq) + 2e⁻
• Since K⁺ and OH⁻ ions After the procedure is complete, a mixture of potassium hydroxide solution and bromine solution is supplied in the electrolytic vessel so that the electrolyte is not drained, and the bromine solution created at the anode.

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