Required Practical 8 (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
9 questions from this quiz
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Practise the questions
9 questions from this quiz
What concentration of solution is used in the zinc-copper electrochemical cell?
What concentration of solution is used in the zinc-copper electrochemical cell?
1.0 mol dm⁻³
Why is propanone classified as hazardous in this practical?
Why is propanone classified as hazardous in this practical?
It is flammable
Why are the metal electrodes cleaned with emery paper before use?
Why are the metal electrodes cleaned with emery paper before use?
To remove any oxide layer
What is the main function of the salt bridge in an electrochemical cell?
What is the main function of the salt bridge in an electrochemical cell?
Allows movement of ions between half-cells
Why must the salt bridge be inert?
Why must the salt bridge be inert?
Not react with electrolyte or ions
What volume of solution is placed in each half-cell?
What volume of solution is placed in each half-cell?
50 cm³
Which voltmeter terminal is the copper electrode connected to when comparing electrode potentials?
Which voltmeter terminal is the copper electrode connected to when comparing electrode potentials?
Positive terminal
What does the EMF of an electrochemical cell depend on?
What does the EMF of an electrochemical cell depend on?
Difference in electrode potentials
What does a positive EMF value indicate about electron flow in the zinc-copper cell?
What does a positive EMF value indicate about electron flow in the zinc-copper cell?
Spontaneous flow from zinc to copper