C4-chemical changes Flashcards
1
Q
reactivity series (order)
A
potassium (most reactive)
sodium
calcium
magnesium
aluminium
carbon
zinc
iron
tin
lead
hydrogen
copper
silver
gold
platinum(least reactive)
2
Q
electrolysis
A
the splitting up of an ionic substance using electricity
3
Q
process of electrolysis
A
two electrodes are placed on electrode.
4
Q
anode
A
positive electrode
5
Q
cathode
A
negative electrode
6
Q
electrolysis in aqueous solutions
A
if the metal is more reactive than hydrogen,hydrogen will be produced at the negative cathode.at the positive anode negatively charged ions lose electrons- oxidised
