498024
Beschreibung
Mindmap von Georgia Mealings, aktualisiert more than 1 year ago
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Erstellt von Georgia Mealings
vor fast 11 Jahre
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Electrolysis
- Electrolysis-When a
compound is split up using
electrical energy. An
electrical current is made to
pass through a solution of the
compound.
- Electrolysis of water
produces Hydrogen and
Oxygen
- Calcium can be created
through electrolysis of
seawater
- Electrolysis of hydrochloric
acid produces hydrogen gas at
the negative electrode (the
cathode) and chlorine gas at
the positive electrode.
- Chlorine is important
for the manufacture of
poly(chloroethene)
and of bleach.
- The 2 electrodes used
in electrolysis have
opposite charges.
- Negative ions are attracted to the
positive electrode and the positive
ions are attracted to the negative
electrode. In this way the ions in
the solution separate and move to
opposite electrodes.
- Gases produced at the electrode are
less dense than liquid so bubble up.
Gases can be captured when they
displace water from an upturned
container.
- Electrolysis of hydrochloric
acid produces an equal
volume of gas at each
electrode. There are equal
amounts of chlorine and
hydrogen in hydrochloric
acid (HCl).
- Twice as much hydrogen as oxygen is
produced when water is electrolysed. This
tells us that there is twice as much
hydrogen as oxygen in water (H2O).
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