Redox
Under what conditions will ionic compounds conduct electricity?
Molten or aqueous
True or false- oxygen is formed at the anode of molten lead bromide
False
give an example of inert electrodes.
carbon or platinum
What is the name of aluminium ore?
Bauxite
Electron transfer is shown in full or half equations?
Half equations
When electrolyzing molten PbBr, bromine gas can be formed at the cathode or anode?
Anode
True or false- metal can only be formed at the cathode during electrolysis.
True
what should be used for anode during electroplating?
the metal that needs to electroplate the cathode.
What are the electrode made of in aluminium extraction?
graphite
In the metal wire, ____ conduct electricity.
freely moving electrons
What happens to the mass of cathode during electroplating?
cathode will gain mass
what is produced at anode during electrolysis of Al2O3?
O2
True or false- Redox reactions must involve transfer of electrons. Other reactions might also involve transfer of electrons.
False- Only redox reactions involve transfer of electrons. OILRIG
What kind of reaction takes place at the cathode?
Reduction
Why does electrolyte conduct electricity
Because it contains free-moving ions
What happens to the mass of anode during electroplating?
anode will lose mass and eventually totally dissolve.
what is produced at cathode during electrolysis of Al2O3?
Al
What does a rise in oxidation number mean, oxidation or reduction?
Oxidation has occurred
What are the 3 products of NaCl solution electrolysis
chlorine, hydrogen, sodium hydroxide
what is the product on anode during electrolysis of concentrated NaCl solution?
Cl2
During electroplating using CuSO4 solution as electrolyte, is the blue color of CuSO4 solution getting darker, lighter, or not changing?
not changing.
Why do the anode carbon electrodes need to be replaced for new ones during electrolysis of Al2O3?
oxygen gas produced at the anode will react with carbon electrodes at high temperature and consume anodes during electrolysis