A Rechargable Lead/Acid Cell
The cell you will make should
generate about 1.5 volts.
Please read the important
To produce 12 volts we could connect 8 cells
together to produce a battery.
We would then have a rechargable lead-acid battery
similar to those used in a car or used to store electricity produced by
a solar cell.
As a matter of fact, we will need some acid from an old
car battery to start with.
CAUTION: acids are dangerous. Always get the help
of an adult to do this.
Fill a glass jar half full of dilute
Hang two lead fishing sinkers (or
lead strips) from copper wire
Attach the two wires to a source of
direct current (6 volt lantern battery or a battery charger)
One lead strip or sinker will start to
turn brown. This is because the electricity you are using to charge the
cell is turning it into lead oxide. We will soon have a coating of lead
We now have two different materials
in the acid, lead and lead oxide.
Once charged for an hour or two, you should
be able to connect the ends of the copper wires to a 1.5 volt torch
bulb to light it up!
- Take care when using chemicals
- ALWAYS ASK AN ADULT FOR HELP WHEN CARRYING OUT
- PREDICT: Ask your students "If you
charge the cell for 1/2 an hour, how long will it light a bulb for"
- OBSERVE: Let the students charge the
cell and time how long a bulb shines.
- EXPLAIN: What does this show us?
(seniors might like to consider the chemical reaction involved)
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