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chemistry paper 1
electrolysis
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naaz panjshiri
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Cards (3)
pour
50cm3
of solution into a beaker and place a
plastic petri dish
with two holes over the beaker
2. insert electrodes (made from carbon
graphite
) and attach
crocodile
leads to the rods and connect to a low-voltage power supply.
3. if the metal is less
reactive
than hydrogen, the metal is discharged at the
cathode.