Electrolysis Flashcards
What is electrolysis?
Separation of ionic compounds using electricity
What is a Anode?
A Positive Electrode
What is a Cathode?
A Negative Electrode?
What is a electrolyte
Liquid that is a good conductor of electricity (has ions able to move freely)
Define Molten
Melted - In a liquid state
Define Redox
Reaction where reduction and oxidation take place
What is an Ore?
Rock containing metal or metal compounds
What is oxidation?
Gaining oxygen / Losing electrons
What is reduction?
Losing oxygen / Gaining electrons
What is a electrode?
Conducting rod made of metal or graphite (carbon) that carries the current in/out of the electrolyte.
Define Solution
An ionic solid dissolved in water
Metal (electrolysis)
Forms positive ions and is product formed at the negative electrode (cathode)
Non-Metal (Electrolysis)
Forms negative ions and is product formed at the positive electrode (anode) with the exception of H+ ions.
Define Solid ionic compounds
Ions are in a fixed position so are not free to move - cannot be separated by electrolysis.
Define Molten ionic substance
Ions are free to move so can be separated by electrolysis
Products of the electrolysis of molten sodium chloride
Sodium and chlorine
Products of the electrolysis of molten lead bromide
Lead and bromine
Products of electrolysis of molten aluminium oxide
Aluminium and oxygen
Define Inert
Unreactive
What does (aq) mean?
Aqueous solution
What does (s) mean?
Solid
What does (l) mean
Liquid
Define Ion
The charged particle formed when an atom gains or loses electrons
Describe and explain how the ions move during electrolysis
Positively charged ions move to the cathode (negative electrode), negatively charged ions move to the anode (positive electrode) as opposite charges attract.
