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Write the chemistry of recharging the le...

Write the chemistry of recharging the lead stronge battery, highlighting all the materials that are involved during recharging.

Text Solution

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When lead storage battery is recharged, electricl energy is supplied to the cell from the external source: i.e., the cell operates as an electrolytic cell during recharging. All the chemical reactions, which take place during the use of battery, are reversed at this time.
At anode `PbSo_(4(s))+2e^(-)to Pb_((s))+SO_(4(aq))^(2-)`
At cathode `PbSO_(4(s))+2H_(2)O_((l))to PbO_(2(s))^(2-)+4H_((aq))^(+)+2e^(-)`
`underline overline ("Overall reaction"2PbSO_(4(s))+2H_(2)O_((l))toPb_((s))+PbO_(2(s))+2H_(2)SO_(4(aq)))`
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Knowledge Check

  • During the charging of lead storage battery, the reaction occuring at cathode is represented by

    A
    `Pb to Pb^(2+) + 2e^(-)`
    B
    `Pb^(2+) + 2e^(-) to Pb`
    C
    `Pb^(2+) + SO_4^(2-) to PbSO_4`
    D
    `PbSO_4 + 2H_2O toPbO_2 + 4H^(+) + SO_4^(2-) + 2e^(-)`

  • During the charging of a lead-acid storage battery, the cathode reaction is

    A
    Formation of `PbSO_4`
    B
    Reduction of `Pb^(+2)` to Pb
    C
    Formation of `PbO_2`
    D
    Oxidation of Pb to `Pb^(2+)`

  • A lead storage battery is discharged. During the charging of this battery, the reaction that occurs at anode is

    A
    `PbSO_(4) (s) + 2e^(-) to Pb(s) + SO_(4)^(2-)(aq)`
    B
    `PbSO_(4) (s)+ 2H_(2)O(l) to PbO_(2)(s) + SO_(4)^(2-)(aq) +4H^(+) + 2e^(-)`
    C
    `PbSO_(4) (s) to Pb(s) + SO_(4)^(2-)(aq)`
    D
    `PbSO_(4) (s)+ 2H_(2)O(l) + 2e^(-) to PbO_(2)(s) + SO_(4)^(2-)(aq) +2H^(+)`

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