C2.7 Flashcards
What is electrolysis used to produce
To produce alkalis and elements such as aluminium, chlorine and hydrogen
Oxidisation is not just
Oxygen
What is electrolysis
Passing an electric current through a molten ionic substance in a solution which breaks them down into elements
What is an electrolyte
Substance broken down during electrolysis
Where do positive ions go
To the negative electrode
Where do the negative ions go
Positive electrode
What process is used to electroplate
Electrolysis
Examples of electroplating
Copper and silver
What is reduction
Gaining an electron and it happens at the negative electrode
What is oxidisation
Losing an electron and can happen at positive electrode
Why is hydrogen formed in electrolysis
Because the metal is more reactive than hydrogen
Half equations
2Cl minus 👉🏾Cl2+2e-
Or
2Cl minus-2e minus👉🏾Cl2
What is aluminium manufactured by
A molten mixture of aluminium oxide and cryolite
What happens during the electrolysis of aluminium
Aluminium formed at negative electrode . Oxygen formed at negative electrode. Electrode is made of carbon so carbon dioxide is released
Word equation of sodium chloride solution in electrolysis
Sodium chloride solution👉🏾hydrogen + chlorine + sodium hydroxide solution
