Electrolysis Conditions

Topic 4 - Chemical Changes
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Explain how this setup can be improved to allow electrolysis to take place.

Diagram showing a DC power supply connected to two graphite electrodes immersed in solid sodium chloride in a beaker. The question asks how the setup can be improved to allow electrolysis to take place.

[2 marks]

Visual Mark Scheme Breakdown

    • It’s solid now.

    • It should be molten or dissolved in water.

    (1 mark)

Two diagrams comparing sodium chloride as a molten liquid and as an aqueous solution, showing the two conditions that allow ions to move freely during electrolysis.

  • So ions can move freely.

    (1 mark)

Diagram of sodium chloride containing positively and negatively charged ions, illustrating that the ions can move freely when the electrolyte is molten or dissolved in water.
 

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