4. Lead-acid batteries are used in automobiles. The oxidation and reduction half-reactions are: Pb(s) + HSO4 → PbSO4(s) + H* + 2 e PbO2(s) + 3 H* + HSO4 + 2 e → PBSO4(s) + 2 H2O(1) E° = +0.356 V E° = +1.685 V %3D a. Write out the complete balanced redox equation and calculate its standard potential (E°). b. Write out the reaction quotient expression (Q) for this system. c. Calculate the actual voltage (E) generated by the battery at 100.0 °C when [H*]= [HSO4] = 18.1 M %3D %3D d. If a higher (positive) voltage is desired, can this be accomplished by lowering the operational temperature? ... by adding water to dilute the H* and HSO4 species in the battery? Justify your answers.

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4. Lead-acid batteries are used in automobiles. The oxidation and reduction half-reactions are:
Pb(s) + HSO4 → PbSO4(s) + H* + 2 e
PbO2(s) + 3 H* + HSO4 + 2 e → PBSO4(s) + 2 H2O(1)
E° = +0.356 V
E° = +1.685 V
%3D
a.
Write out the complete balanced redox equation and calculate its standard potential (E°).
b. Write out the reaction quotient expression (Q) for this system.
c. Calculate the actual voltage (E) generated by the battery at 100.0 °C when [H*]= [HSO4]
= 18.1 M
%3D
%3D
d. If a higher (positive) voltage is desired, can this be accomplished by lowering the
operational temperature? ... by adding water to dilute the H* and HSO4 species in the
battery? Justify your answers.
Transcribed Image Text:4. Lead-acid batteries are used in automobiles. The oxidation and reduction half-reactions are: Pb(s) + HSO4 → PbSO4(s) + H* + 2 e PbO2(s) + 3 H* + HSO4 + 2 e → PBSO4(s) + 2 H2O(1) E° = +0.356 V E° = +1.685 V %3D a. Write out the complete balanced redox equation and calculate its standard potential (E°). b. Write out the reaction quotient expression (Q) for this system. c. Calculate the actual voltage (E) generated by the battery at 100.0 °C when [H*]= [HSO4] = 18.1 M %3D %3D d. If a higher (positive) voltage is desired, can this be accomplished by lowering the operational temperature? ... by adding water to dilute the H* and HSO4 species in the battery? Justify your answers.
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