Redox in Batteries

Based on the diagram, select the answer with the correct labels:

• A = cathode, B = anode, C = salt bridge

• A = anode, B = salt bridge, C = cathode

• A = salt bridge, B = anode, C = cathode

• A = anode, B = cathode, C = salt bridge

Oxidation occurs at which part of a battery (electrochemical cell)?

• Cathode

• Anode

• Salt Bridge

• None of the above

Reduction occurs at which part of a battery (electrochemical cell)?

• Cathode

• Anode

• Salt Bridge

• None of the above

How do batteries produce power?

• Movement of electrons from the cathode to the anode.

• Movement of electrons through the salt bridge.

• Movement of electrons from the anode to the cathode.

• Batteries store power, they don't produce it.

What is the purpose of a salt bridge?

• To allow movement of electrons from the anode to the cathode.

• To allow movement of electrons from the cathode to the anode.

• To balance the positive charge in the anode solution and the negative charge in the cathode solution.

• To balance the positive charge in the cathode solution and the negative charge in the anode solution.

The given reaction is for lead storage batteries done under acid (H₂SO₄ is an acid). What species is being reduced in this reaction?

• Pb

• PbO₂

• H₂SO₄

• None of the above

The given reaction is for lead storage batteries done under acid (H₂SO₄ is an acid). What species is being oxidized in this reaction?

• Pb

• PbO₂

• H₂SO₄

• None of the above

The given reaction is for a nickel-cadmium battery, in a basic solution (a base dissolved in water). What species is being reduced in this reaction?

• NiO(OH)

• Cd

• H₂O

• None of the above

The given reaction is for a nickel-cadmium battery, in a basic solution (a base dissolved in water). What species is being oxidized in this reaction?

• NiO(OH)

• Cd

• H₂O

• None of the above

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