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IB Chemistry HL 3.2.15 Hl Electrolysis of Aqueous Solutions Questions

Use real HL exam questions to decide which aqueous ions or water react at each electrode and justify the products with half-equations and potentials.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • Compare reduction at the cathode and oxidation at the anode to determine which aqueous species is discharged, including water where it competes.
  • Deduce and justify the electrode products and half-equations from standard potentials, concentration and electrode material.

IB Chemistry HL 3.2.15 Hl Electrolysis of Aqueous Solutions Questions question 1

[Maximum number: 2]

Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds.

Magnesium chloride can be electrolysed.

State the products when a very dilute aqueous solution of magnesium chloride is electrolysed.

Anode (positive electrode):

Cathode (negative electrode):

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