Topic 4 Extracting Metals And Equilibria Flashcards
What is the reactivity series?
Most reactive:
potassium
Sodium
Calcium
Magnesium
Aluminium
Zinc
Iron
Hydrogen
Copper
Silver
Gold
What is produced when metal reacts with water and acid?
Hydrogen
What is OIL RIG?
Oxidation is loss of electrons
Reduction is gain of electrons
What happens in displacement reaction?
Atoms of more reactive metals are oxidised
Atoms of less reactive metals are reduced
What are metal ores?
An ore is a rock that contains enough of a metal to make its extraction economical
What is phytoextraction?
Phytoextraction is a biological method of metal extraction that uses plants
What is bioleaching?
Bioleaching is a biological method of metal extraction that uses bacteria
What is good for recycling metals?
Metal ores will last longer
Less energy is needed
Less land is needed
What are the processes of life-cycle assessments?
Obtaining raw materials
Manufacturing the product
Using the product
Disposing of the product
What is dynamic equilibrium?
This is when both forward and backward reaction keep going- they do not stop at equilibrium
What is reversible reaction?
Chemical reactions are reversible. They can be Forward or backward reactions and can be altered to a change in conditions
What is the haber process?
The haber process is a reversible reaction between nitrogen and hydrogen to form ammonia
What are the conditions for the haber process?
Temperature 450(degrees)
Pressure 200 atmospheres \iron catalyst
What are displacement reactions?
A more reactive metal will displace a less reactive metal from its salts in solution. Magnesium will replace copper from copper sulfate solution.
Mg + CuSO4 -> MgSO4 + Cu
An increase in temperature means an exothermic reaction
Where are metal ores found and extracted?
Most metals are extracted from ores found in the earth’s crust
Unreactive metals are found in the earths crust as the uncombined elements
