Required practical - Electrolysis (AQA GCSE Chemistry Combined Science): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What is electrolysis?
What is electrolysis?
Breakdown of ionic compounds w/ electricity
What type of current is needed for electrolysis?
What type of current is needed for electrolysis?
Direct current (dc)
Why are graphite electrodes used in this practical?
Why are graphite electrodes used in this practical?
They are inert and don't react
Why do ionic solutions conduct electricity?
Why do ionic solutions conduct electricity?
Ions can move freely as charge carriers
Where do positive ions move during electrolysis?
Where do positive ions move during electrolysis?
To the negative electrode (cathode)
Where do negative ions move during electrolysis?
Where do negative ions move during electrolysis?
To the positive electrode (anode)
What forms at the cathode during copper chloride electrolysis?
What forms at the cathode during copper chloride electrolysis?
Red-brown solid (copper metal)
What forms at the anode during copper chloride electrolysis?
What forms at the anode during copper chloride electrolysis?
Pale-green gas (chlorine)
What forms at the cathode during potassium bromide electrolysis?
What forms at the cathode during potassium bromide electrolysis?
Colourless gas (hydrogen)
What forms at the anode during potassium bromide electrolysis?
What forms at the anode during potassium bromide electrolysis?
Orange solution (bromine)
What process occurs at the cathode?
What process occurs at the cathode?
Reduction (gaining electrons)
What process occurs at the anode?
What process occurs at the anode?
Oxidation (losing electrons)
Why must chlorine gas be produced in a fume cupboard?
Why must chlorine gas be produced in a fume cupboard?
It is toxic and harmful to breathe