Lessons 1-3: Metal reactions and Redox Flashcards
What is oxidation (in terms of oxygen)?
- This is the gain of oxygen.
What is reduction (in terms of oxygen)?
- Reduction is the loss of oxygen.
What are redox reactions?
- Redox reactions are ones that involve both reduction and oxidation.
What metals, in reactivity series, can be extracted by heating with carbon (reduction)?
- Metals that are less reactive than carbon.
- ie. zinc, iron
What metals need to be extracted by electrolysis on reactivity series?
- Metals more reactive than CARBON need to be extracted by electrolysis.
Give 2 metals that are found INATE.
- Gold
- Silver
Why are gold and silver found native?
They are unreactive so don’t react with other elements, forming a compound.
What is oxidation (in terms of electrons)?
- Oxidation is the loss of electrons.
What is reduction, in terms of electrons?
- Reduction is the gain of electrons.
REDUCED/ OXIDISED
Cl₂ –> 2Cl⁻
- Reduced
- Gained electrons.
What is an ore?
A naturally occuring rock where metal is concentrated enough to make extracting profitable.
How is iron chemically separated from its ore?
- Heated with carbon in blast furnace.
- Iron oxide + carbon –> iron + carbon dioxide.
What does a metal’s reactivity depend on?
- Depends on its tendency to form positive ions.
Give the metals in reactivity series.
Potassium, Sodium, Lithium, Calcium, Magnesium, Aluminium, CARBON, zinc, iron, HYDROGEN, copper, silver, gold.
What is a displacement reaction?
- This is when a more reactive metal displaces a less reactive meal from its compounds.
