The following reactions take place in a lead storage battery.
Discharging: Pb(s) + PbO2(s) + 4H+(aq) + 2SO42-(aq) → 2PbSO4(s) + 2H2O(l)
Charging: 2PbSO4(s) + 2H2O(l) → Pb(s) + PbO2(s) + 4H+(aq) + 2SO42-(aq)
Which of the following statements is true?
A) The concentration of H2SO4 increases as the battery discharges.
B) Pb is formed at the anode during discharge.
C) Pb is formed at the cathode during charging.
D) The mass of Pb decreases during charging.
E) The mass of PbSO4 remains constant during charging and discharging.
Correct Answer:
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