Reactivity of metals

Question 1

What is the reactivity series?

Answer 1

A list of elements ordered by their reactivity. (Potassium, sodium, Ca, Mg, Al, (C), Zn, iron, (H), Cu, silver, gold)

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Question 2

How can metals be placed in order of their reactivity?

Answer 2

Add the metals to water or acid and see which ones react the most (by how much fizzing there is)

Question 3

What does effervescence mean?

Answer 3

Bubbling

Question 4

What is the name for a reaction where oxygen is removed from a compound?

Answer 4

Reduction

Question 5

What is the name for a reaction where oxygen is gained by a compound?

Answer 5

Oxidation

Question 6

Explain why gold can be found naturally in the Earth’s crust

Answer 6

It is very unreactive

Question 7

Define a displacement reaction

Answer 7

A reaction in which a more reactive element takes the place of a less reactive element in one of its compounds or in solution

Question 8

Which metals can be extracted from their compounds by reacting them with carbon?

Answer 8

Any that are less reactive than carbon because they will be displaced.

Question 9

Explain why zinc can be extracted from zinc oxide with carbon but magnesium cannot be extracted from magnesium oxide with carbon

Answer 9

Magnesium is more reactive than carbon (1)
Zinc is less reactive than carbon (1)
Carbon can therefore displace zinc from zinc oxide but not magnesium from magnesium oxide (1)

Question 10

What process is used to extract metals more reactive than carbon?

Answer 10

Electrolysis

Question 11

What are the two main disadvantages of using electrolysis to extract metals?

Answer 11

Requires a large amount of energy to melt the compounds and to produce the necessary electricity

Question 12

What colour is copper sulfate solution?

Answer 12

Blue