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Lead acid battery
Year 12
Question | Answer |
---|---|
How does a lead acid battery work? | Once the car engine is running, a current from the alternator, reacharges the battery. |
The anode reaction in a lead acid battery is: | PbSO4(s) + 2H2O(l) ---> PbO2(s) + 4H+(aq) + SO4^2-(aq)+ 2e- |
The cathode reaction in a lead acid battery is: | PbSO4(s) +2e- ---> Pb(s) +SO4^2-(aq) |
What happens to a lead acid battery, whilst it is running | - It continually recharges - Electrical energy reverses the chemical reaction so that PbSO4 formed is converted back to Pb and PbO2 |
The metal that is reduced is connected to the _____external circuit | positive |
The greatest voltage involves: | The most reactive + least reactive |