Question

While charging the lead storage battery

• A. $PbSO_4$ on anode is reduced to $Pb$
• B. $PbSO_4$ on cathode is reduced to $Pb$
• C. $PbSO_4$ on cathode is oxidized to $Pb$
• D. $PbSO_4$ on anode is oxidized to $PbO_2$

Hint:

During the charging process of a lead storage battery, specific reactions occur at the cathode and anode, resulting in the reduction and oxidation of lead sulfate compounds.

Answer 1

The Correct Option is D

The cell reactions during charging of lead storage battery are 
At anode
\(PbSO_{4}\left(s\right)+ 2e^{-} \to Pb\left(s\right)+ SO^{2-}_{4}\left(aq\right)\) 
At cathode 
\(PbSO_{4}\left(s\right)+ 2H_{2}O\left(l\right) \to PbO_{2}\left(s\right)+ SO^{2-}_{4}\left(aq\right) + 4H^{+} \left(aq\right)+2e^{-}\) 
So, \(PbSO_4\) at the anode is reduced to \(Pb\).

During charging, PbO2 is formed at the anode from PbSO4 (oxidation of Pb ion) and Pb is formed at the cathode from PbSO4 (reduction of Pb ion).

Therefore Options B and D are the correct answers.

Discover More From Chapter: Electrochemistry

Answer 2

The Correct Answer is (D): \(PbSO_4\) on anode is oxidized to \(PbO_2\)

Real Life Applications

Applications of the Charging Process of Lead Storage Battery: 
1. Automotive Power: Lead storage batteries power cars, facilitating engine ignition and electrical system operation. Charging reverses lead sulfate crystal growth on battery plates, restoring its capacity. 
2. Backup Generators: Lead storage batteries serve as backup power sources for generators during outages. Charging the battery ensures it can supply essential appliances and equipment when needed. 
3. Uninterrupted Power Supply (UPS): UPS systems utilize lead storage batteries to provide backup power to sensitive equipment like computers. Charging enables the battery to support devices until regular power is restored. By using the charging process to reverse chemical reactions, lead storage batteries remain reliable power sources across various applications.

Question can also be asked as

1. What happens at the anode and cathode during the charging of a lead storage battery?
2. How are lead sulfate (PbSO₄) and lead dioxide (PbO₂) formed during the charging of a lead storage battery?
3. What are the oxidation and reduction reactions that occur during the charging of a lead storage battery?

Answer 3

The Correct Answer is (D): \(PbSO_4\) on anode is oxidized to \(PbO_2\)

The charging process of a lead storage battery involves a series of chemical reactions that convert lead sulfate compounds back to their original forms. 

• The cathode of a lead storage battery is a crucial component involved in the charging process.
• During charging, lead sulfate (PbSO4) on the cathode undergoes reduction, leading to the formation of metallic lead (Pb).
• This reduction reaction helps restore the cathode to its original state and allows the battery to store electrical energy.
• The anode of a lead storage battery plays an equally important role in the charging process.
• At the anode, lead sulfate (PbSO₄) is oxidized, resulting in the formation of lead dioxide (PbO₂).
• This oxidation reaction allows the anode to recover its original composition and prepares the battery for subsequent discharge.

The charging process of a lead storage battery involves the simultaneous reduction of lead sulfate at the cathode and oxidation of lead sulfate at the anode. Through these redox reactions, the battery replenishes its energy storage capacity, enabling it to deliver electrical power when needed.

Also Check:

Daniell Cell	Reduction Potential	Electrodes
Electrolytic and Galvanic Cells	Difference Between Cell and Battery	Standard Hydrogen Electrode