Unit 3 AOS 2 - Electrolysis: Principles and Predictions (3B)

What is the primary factor that determines the products of electrolysis in an aqueous solution?

• The type of electrode material used

• The electrochemical series

• The temperature of the solution

• The pressure of the system

Which of the following is a limitation of using the electrochemical series to predict electrolysis products?

• It does not account for the concentration of ions

• It only applies to molten salts

• It requires high temperatures

• It is only applicable to non-metallic elements

In the electrolysis of molten sodium chloride, what is the product formed at the cathode?

• Chlorine gas

• Sodium metal

• Hydrogen gas

• Oxygen gas

Which of the following equations correctly represents the reaction at the anode during the electrolysis of aqueous copper(II) sulfate using copper electrodes?

What is the overall redox reaction for the electrolysis of water?

Which of the following is a common design feature of commercial electrolytic cells?

• Use of non-conductive materials for electrodes

• Continuous removal of products as they form

• Use of high-pressure systems

• Use of non-aqueous electrolytes only

Why is it important to select suitable electrode materials in an electrolytic cell?

• To ensure the electrodes dissolve in the electrolyte

• To prevent unwanted side reactions

• To increase the temperature of the cell

• To decrease the cell voltage

In the electrolysis of aqueous sodium chloride, which gas is produced at the anode?

• Hydrogen gas

• Oxygen gas

• Chlorine gas

• Nitrogen gas

What is the role of chemical additives in an electrolytic cell?

• To increase the cell voltage

• To change the colour of the electrolyte

• To achieve a desired electrolysis product

• To decrease the temperature of the cell

Which of the following reactions occurs at the cathode during the electrolysis of aqueous copper(II) sulfate using inert electrodes?