Electrolysis of Copper Solutions

The video tutorial demonstrates the electrolysis of copper sulfate using both inert and copper electrodes. Initially, inert electrodes are used, with the anode connected to the positive output and the cathode to the negative. Oxygen gas is produced at the anode, while copper deposits at the cathode. The experiment is repeated with copper electrodes, where copper ions are discharged at the cathode, and impurities are observed in the electrolyte. The video highlights the reactions occurring at each electrode and the resulting deposits.

What is the role of the red cable in the electrolysis setup with inert electrodes?

• It is connected to the cathode.

• It is connected to the anode.

• It is used to measure current.

• It is used to measure voltage.

During electrolysis with inert electrodes, what gas is produced at the anode?

• Nitrogen gas

• Hydrogen gas

• Oxygen gas

• Carbon dioxide

What is deposited at the cathode when using inert electrodes?

• Iron

• Copper

• Zinc

• Silver

What is the primary purpose of using inert electrodes in the experiment?

• To react with the electrolyte

• To remain unchanged during the reaction

• To produce more copper

• To change the color of the solution

In the setup with copper electrodes, what happens at the anode?

• Oxygen gas is produced.

• Copper ions are liberated into the solution.

• Copper ions are deposited.

• Hydrogen gas is produced.

What is the color of the impurities observed in the electrolyte during the experiment with copper electrodes?

• Black

• Blue

• Yellowish-green

• Reddish-brown

Which ions are discharged at the cathode during the electrolysis of copper sulfate with copper electrodes?

• OH- ions

• SO4 2- ions

• H+ ions

• Cu2+ ions

What is the main observation at the cathode when using copper electrodes?

• Formation of bubbles

• Reddish-brown deposit of pure copper

• Yellowish-green impurities

• No change

What is the significance of the reddish-brown deposit observed at the cathode?

• It is a sign of electrode corrosion.

• It indicates the presence of impurities.

• It suggests a faulty setup.

• It shows the deposition of pure copper.