extraction of metals and redox

Created by

Lilly Boudlet

Cards (22)

Explain why some metals are more reactive than others.
they lose electrons more readily (easily)
Name two metals found as the metals themselves in the Earth's crust.
Gold and silver
Which types of metals can be extracted from their oxides by reduction with carbon?
metals less reactive than carbon
Which types of metals cannot be extracted from their oxides by reduction with carbon?
metals more reactive than carbon
Explain why gold and silver can be found as the metals themselves in the Earth's crust.
They are very unreactive.
Name the process used to extract metals more reactive than carbon.
electrolysis
What mnemonic can we use to remember oxidation and reduction?
OIL RIG
oxidisation is loss of electrons
reduction is gain of electrons
Define oxidation in terms of the loss and gain of electrons.
Oxidation is the loss of electrons.
Define reduction in terms of the loss and gain of electrons.
Reduction is the gain of electrons.
Define redox reaction.
A reaction where oxidation and reduction have taken place.
State and explain whether this process is oxidation or reduction. Al → Al³⁺ + 3e⁻
Oxidation, as aluminium has lost electrons.
State and explain whether this process is oxidation or reduction. Na⁺ + e⁻ → Na
Reduction, as sodium ions have gained electrons.
State and explain whether this process is oxidation or reduction. F₂ + 2e⁻ → 2F⁻
.reduction as fluorine has gained electrons
State and explain whether this process is oxidation or reduction. Fe²⁺ → Fe³⁺ + e⁻
oxidation, as iron ions have lost electrons.
In a reaction, sodium displaces lithium from a compound. Complete the ionic equation: Na + Li⁺ →
Na + Li⁺ → Na⁺ + Li
In a reaction, calcium displaces magnesium from a compound. Complete the ionic equation: Ca + Mg²⁺ →
Ca + Mg²⁺ → Ca²⁺ + Mg
In a reaction, chlorine displaces bromine from a compound. Complete the ionic equation: Cl₂ + 2Br⁻ →
Cl₂ + 2Br⁻ → Br₂ + 2Cl⁻
In this reaction, what has been oxidised and what has been reduced? Mg²⁺ + 2Na → 2Na⁺ + Mg
Na has been oxidised. Mg²⁺ has been reduced.
In this reaction, what has been oxidised and what has been reduced? 2Al + 3Ca²⁺ → 2Al³⁺ + 3Ca
Al has been oxidised. Ca²⁺ has been reduced.
In this reaction, what has been oxidised and what has been reduced? K + Na⁺ → K⁺ + Na
K has been oxidised. Na⁺ has been reduced.
In this reaction, what has been oxidised and what has been reduced? Cl₂ + 2Br⁻ → Br₂ + 2Cl⁻
Cl₂ has been reduced. Br⁻ has been oxidised .
What is an ore?
A metal that contains a metal which is profitable to extract