term1 Definition1term2 Definition2term3 Definition3
Please sign in to your Google account to access your documents:
What is a displacement reaction
A redox reaction
What does the term redox mean
Reduction and oxidation happen simultaneously
What happens in a displacement reaction
A more reactive element reacts to take the place of a less reactive element in a compound
the more reactive metal is oxidised and less reactive metal is reduced
What is the metal ore
A rock which contains enough metal to make it economically worthwhile extracting the metal from it
How can some metals be extracted by reduction with carbon
Metals below carbon in the reactivity series can be extracted by reduction using carbon because carbon can only take the oxygen away from metals which are less reactive than itself
How do you extract metals that are more reactive than carbon
Using electrolysis of molten compounds the metal or is melted and electrical current is passed through it the metal is this charge at the cathode and the non-metal at the anode
What are the disadvantages of electrolysis as a method of extracting metals compare to reduction with carbon
Electrolysis is more expensive as needs electricity and can be expensive to melt or dissolve the metal ore
What are the biological methods to extract metals
Bioleaching uses bacteria to separate metals from there ores
bacteria get energy from the bonds between the atoms separating out the metal from the in the process
the leachate (The solution produced by the process) contains metal ions which can be extracted with a more reactive metal
What is another method of biologically extracting metals
Phytoextraction growing plants and soil that contains metal compounds metals gradually build up in the leaves plants can be harvested dried and burned in furnace the ashes contain metal compounds from which the metal committee extracted by electrolysis or displacement reactions
Need help typing ? See our FAQ (opens in new window)
Please sign in to create this set. We'll bring you back here when you are done.
Discard Changes Sign in
Please sign in to add to folders.
Sign in
Don't have an account? Sign Up »
You have created 2 folders. Please upgrade to Cram Premium to create hundreds of folders!