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IB Chemistry HL 3.2.6 Primary Voltaic Cells Questions

Use real HL exam questions to draw voltaic cells, trace electrons and explain how salt bridges complete the circuit.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • Draw or interpret a voltaic cell with two metal/metal-ion half-cells, electrodes, electrolytes, salt bridge and an external circuit.
  • Identify the spontaneous redox reaction and electron flow from the anode to the cathode through the external circuit.
  • Explain salt-bridge ion movement and electrical neutrality, and choose or label the cell arrangement that supports the stated voltaic reaction.

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Study 3.2.6—Primary (voltaic) cells conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry HL 3.2.6 Primary Voltaic Cells Questions question 1

[Maximum number: 1]

As well as being burnt, methanol can also be used to provide electricity through a fuel cell. A schematic diagram of such a fuel cell, that depends on the transfer of hydrogen ions between the electrodes, is shown below.

Figure for Question IB Chemistry HL 3.2.6 Primary Voltaic Cells Questions question 1 — IB Chemistry HL

Even though fuel cells, primary cells and rechargeable cells have similar fundamental characteristics, there are important differences between them.

Suggest a way in which they are similar.

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