EJU Japan · EJU Chemistry

Electrochemistry

12 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 12 questions

  1. A current is passed through a solution of a Al salt so that 9650 C of charge flows (F = 96 500 C/mol). What mass of Al is deposited at the cathode? (Al = 27)
  2. A current is passed through a solution of a Zn salt so that 48250 C of charge flows (F = 96 500 C/mol). What mass of Zn is deposited at the cathode? (Zn = 65)
  3. A current is passed through a solution of a Zn salt so that 96500 C of charge flows (F = 96 500 C/mol). What mass of Zn is deposited at the cathode? (Zn = 65)
  4. A current is passed through a solution of a Al salt so that 19300 C of charge flows (F = 96 500 C/mol). What mass of Al is deposited at the cathode? (Al = 27)
  5. A current is passed through a solution of a Cu salt so that 28950 C of charge flows (F = 96 500 C/mol). What mass of Cu is deposited at the cathode? (Cu = 64)
  6. A current is passed through a solution of a Zn salt so that 28950 C of charge flows (F = 96 500 C/mol). What mass of Zn is deposited at the cathode? (Zn = 65)
  7. A current is passed through a solution of a Al salt so that 96500 C of charge flows (F = 96 500 C/mol). What mass of Al is deposited at the cathode? (Al = 27)
  8. A current is passed through a solution of a Zn salt so that 9650 C of charge flows (F = 96 500 C/mol). What mass of Zn is deposited at the cathode? (Zn = 65)
  9. A current is passed through a solution of a Cu salt so that 19300 C of charge flows (F = 96 500 C/mol). What mass of Cu is deposited at the cathode? (Cu = 64)
  10. A current is passed through a solution of a Zn salt so that 19300 C of charge flows (F = 96 500 C/mol). What mass of Zn is deposited at the cathode? (Zn = 65)
  11. In a Daniell cell (Zn|ZnSO || CuSO|Cu), at which electrode does oxidation occur?
  12. Which product forms at the cathode during electrolysis of aqueous sodium chloride with inert electrodes?

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