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Explain that electrolysis is the process of breaking down an ionic compound, either when it is melted or dissolved in water, through the flow of electric current.

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Cambridge IGCSE Combined ScienceElectrochemistryCore content

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Quick explanation

Explain that electrolysis is the process of breaking down an ionic compound, either when it is melted or dissolved in water, through the flow of electric current

  • This point belongs to Electrolysis, especially Electrolysis outcomes.
  • You need to be able to explain that electrolysis is the process of breaking down an ionic compound, either when it is melted or dissolved in water, through the flow of electric current.
  • The key ideas to know are Define.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

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Define

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Paper 3 structured question: Electrolysis

Paper 3Theory (Core)3 marks

Description

Electrolysis of Sodium Chloride Solution

When sodium chloride (NaCl) is dissolved in water, it dissociates into sodium ions (Na+) and chloride ions (Cl-). When an electric current is passed through the solution, electrolysis occurs.

  1. a

    Explain the process of electrolysis that occurs when sodium chloride solution is electrolyzed.

    Aim for approximately 3 distinct marking points.

    [3]
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