[C5] Electricity and chemistry Flashcards
Define electrolysis.
Breakdown of an ionic compound when molten or in an aqueous solution by the passage of electricity
What is an Electrode?
A rod of metal or graphite through which an electric current flows into or out of an electrolyte.
What is an Electrolyte? [3]
An ionic compound in a molten or dissolved solution that conducts electricity.
A liquid that conducts electricity.
The product made from electrolysis.
What is an ionic bond?
It is the type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.
How does non-metal become an anion?
By gain of an electron. (-)
How does metal become an cation?
By loss of electron (+)
How are electrolytes made?
By melting or disslolving ionic compounds.
Which property of metal allows it to conduct electricity?
Freely moving electrons.
Why do compounds need to be in a molten state through electrolysis?
Ions can move free when molten.
What is an electroplating?
process of using electrodeposition to coat an object in a layer of metal
why is electroplating important? [4]
- Creates a protective layer to reduce friction
- prevent tarnishing of a surface
- looks better
- prevent corrosion by blocking oxygen molecules from the air to oxidise.
Define electricity
Stream of electrons.
What is an inert electrode?
An electrode that serves only as a source or sink for electrons without playing a chemical role in the electrode reaction.
What are examples of inert electrodes? [4]
- platinum
- gold
- graphite(carbon)
- rhodium.
Where does metals or hydrogen generally get formed at. (Cathode or Anode)
Negative elctrode = Cathode
