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IB Chemistry HL 3.2.15 Aqueous Electrolysis Question Bank

Practise IB Chemistry HL 3.2.15 with questions choosing aqueous electrolysis products by comparing competing oxidation and reduction reactions.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • list both dissolved ions and water as possible participants at each inert electrode
  • compare reduction tendencies at the cathode and oxidation tendencies at the anode
  • justify each product from potentials, concentration and electrode material supplied

3.2.15 (HL)—Electrolysis of aqueous solutions 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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