Topic 5 📚 Flashcards
What is electrolysis?
Electrolysis is the process that splits ionic compounds into the different elements that they are made of
What happens when ionic compounds are melted or dissolved in water?
.the ions are free to move around
.the solution will conduct electricity
What are positively charged ions called?
Anodes
What are negatively charged ions called?
Cathodes
How do you produce elements?
. when an ion touches an electrode electrons can be transferred
What are positive metal ions called?
Cations
What is a negatively charged ion?
Anions
How is electrolysis used in extracting metals?
. electrolysis is used to extract reactive metals from molten ores
What happens at the anode?
.oxygen forms at the carbon anode
.the carbon and oxygen react to give carbon dioxide
What happens at the cathode?
.aluminium is formed
What are disadvantages if electrolysis?
.lots of energy
.very expensive
What are two biological methods for extracting copper from low-grade ores?
.bioleaching
.phtomining
What is the name of the method used to extract aluminium from its core?
Electrolysis
What is the name of the particle that transfers heat and electrical energy?
Electrons
