1.

A lead storage battery has been used for one month (30 days) at the rate of one hour per day by drawing a constant currentof 2 amperes. H_(2)SO_(4) consumed by the battery is:-

Answer»

1.12 mole
2.24 mole
3.36 mole
4.48 mole

Solution :The reactions occurring during discharge are:
Anode: `Pb(s)+SO_(4)^(2-)(AQ)toPbSO_(4)(s)+2E^(-)`
`underset("At cathode:"PbO_(2)(s)+4H^(+)(aq)+SO_(4)^(2-)(aq)+2e^(-)toPbSO_(4)(s)+2H_(2)O(l))`
Overall reaction reaction: `Pb(s)+PbO_(2)(s)+2H_(2)SO_(4)to2PbSO_(4)(s)+2H_(2)O(l)`
Quantity of electricity consumed
`=(2A)(30xx3600s)=216000C`
`2xx96500` coulombs consume `H_(2)SO_(4)=2` MOLES
`therefore216000` coulombs will consume `H_(2)SO_(4)`
`=(1)/(96500)xx216000=2.24` moles.


Discussion

No Comment Found

Related InterviewSolutions