Extracting Metals And Equilibria Flashcards
(13 cards)
What does oxidation mean
The reaction with or addition of oxygen
What does reduction mean
The removal of oxygen
Reactivity series
Potassium K Sodium Na Calcium Ca Magnesium Mg Aluminium Al Carbon C Zinc Zn Iron Fe Hydrogen H Copper Cu Silver Ag Gold Au
Which elements are the least and most to reactive to oxidation in the reactivity series
Least - Potassium
Most - Gold
Which elements are the most reactive and least reactive in the reactivity series
Most - Potassium
Least - Gold
What usually happens to the most reactive elements
They easily lose there electrons to form cations
They are oxidised easily
What usually happens to the elements on the bottom of the reactivity series
They are less reactive
They dont form cations easily
They are more resistant to oxidation
What is a redox reaction
When reduction (gain of electrons) and Oxidation (loss of electrons) happen simultaneously. Eg displacement reactions
What happens during a redox reaction
The more reactive metal will be oxidised and the less reactive metal is reduced
How can a metal be extracted using carbon
The metal is extracted from its ore chemically by reduction using carbon. When the ore is reduced the oxygen is removed from it.
Which metals have to be extracted using electrolysis
Metals higher than carbon
Which metals have to be extracted by reduction
Metals below carbon. This is because carbon can only take the oxygen away from metals which are less reactive than carbon itself is
Give positives about recycling
Conserves resources
Conserves energy
Cuts rubbish in landfill that pollutes surroundings
Saves money on extracting expensive metals
Creates jobs
