CHEM: ELECTROLYSIS Flashcards
conduct electricity when molten or aqueous.
Ionic compounds
When an electric current passes through such
compounds, the compounds are decomposed in a
chemical reaction. This is known as
electrolysis.
The ionic compound
electrolyte
are usually made of carbon or platinum,
as they are unreactive or inert. They do not react
with the compounds in electrolysis.
Electrodes
The decomposition of a substance by electricity
electrolysis.
is an ionic compound, in the molten or aqueous state, that conducts electricity and is decomposed by the current.
electrolyte
The rods through which the direct current enters
and leaves the cell
electrodes
are usually inert.
electrodes.
is the electrode which is connected to
the positive terminal of a cell.
anode
is the electrode connected to the negative terminal of the cell.
cathode
are attracted to the cathode.
Cations
Negative ions from the electrolyte are discharged if
they are
chloride, bromide or iodide ions
For sulphates and nitrates, _________ from water is discharged
oxygen
Positive ions from the electrolyte that are below _______ in the electrochemical (or reactivity) series
are discharged at the negative cathode.
Ni2+(aq)
If the positive ions are those of reactive metals
above hydrogen gas from water
Ni2+(aq) (e.g.. Na+, K+ and Ca2+), discharged.
