4 Chemical Changes - Reactivity Series Flashcards
1
Q
What is the name for a reaction where oxygen is removed from a compound?
A
Reduction
2
Q
Explain why zinc can be extracted from zinc oxide with carbon but magnesium cannot be extracted from magnesium oxide with carbon
A
Magnesium is more reactive than carbon (1), Zinc is less reactive than carbon (1), Carbon can therefore remove oxygen from zinc oxide but not magnesium oxide (1)
3
Q
Explain why gold and silver can be found naturally in the Earth’s crust
A
It is very unreactive
4
Q
What process is used to extract metals more reactive than carbon
A
Electrolysis
5
Q
Which of the substances below has been oxidized and which has been reduced? Al^3+ + Fe –> Fe^3+ + Al
A
Aluminium has been reduced and iron has been oxidised
