Flashcards in 2.7 Electrolysis Deck (17)
Metals like gold are found as pure metals rather than ores in the earth because they are...
What form must a substance be in, in order to be electrolysed?
Negative electrode is called?
Positive electrode is called?
If MgO2 is being electrolysed, would it be Mg or O that goes to the Cathode?
Mg because it is a positive ion and opposites attract
What is oxidation?
Loss of electrons
What is reduction?
Gain of electrons (electrons are negatively charged so I gain of them is technically reduction!)
Which process is cheaper? Recycling or extraction?
What is electroplating?
Coat an object with a thin layer of (another) metal
What is electrolysis powered by?
What is the electrolysis of brine?
The electrolysis of brine is a large-scale process used to manufacture chlorine from salt
Why is the extraction of aluminium expensive
Mostly because of the amount of electricity used
Which electrode does the aluminium metal form at
The negative electrode
What is aluminium ore called?
How is the aluminium oxide prepared for electrolysis
the aluminium oxide must be melted so that electricity can pass through it
What Is the definition of electrolysis?
The process of electrolysis is using an electric current to make a chemical change and make new chemicals