The Process of Electrolysis (Edexcel GCSE Chemistry): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does electrolysis use to separate an ionic compound into its constituent ions?
What does electrolysis use to separate an ionic compound into its constituent ions?
An electric current
Why must an ionic compound be molten or dissolved for electrolysis to occur?
Why must an ionic compound be molten or dissolved for electrolysis to occur?
So ions are free to move
Why can't ions in a solid ionic compound move during electrolysis?
Why can't ions in a solid ionic compound move during electrolysis?
They are fixed in the crystal lattice
Which electrode is the cathode?
Which electrode is the cathode?
The negative electrode
Which electrode is the anode?
Which electrode is the anode?
The positive electrode
Why are electrodes usually made of inert materials?
Why are electrodes usually made of inert materials?
So they don't react with electrolyte
Which ions are attracted to the cathode during electrolysis?
Which ions are attracted to the cathode during electrolysis?
Positive ions
What happens to positive ions at the cathode?
What happens to positive ions at the cathode?
They gain electrons (reduction)
Which ions are attracted to the anode during electrolysis?
Which ions are attracted to the anode during electrolysis?
Negative ions
What happens to negative ions at the anode?
What happens to negative ions at the anode?
They lose electrons (oxidation)
Where do electrons flow after being released at the anode?
Where do electrons flow after being released at the anode?
To the cathode via external circuit
In what forms can discharged species leave the electrolyte?
In what forms can discharged species leave the electrolyte?
As solid sediments or gases