Reactivity Series

Question 1

State the reactivity series.

Answer 1

Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Hydrogen
Copper
Silver
Gold

Question 2

What is a displacement reaction?

Answer 2

A reactions where a more reactive element takes the place of the less reactive element.

Question 3

Describe the reaction between magnesium and magnesium sulfate

Answer 3

No reaction

Question 4

Describe the reaction between magnesium sulfate and zinc

Answer 4

No reaction

Question 5

Describe the reaction between magnesium sulfate and copper

Answer 5

No reaction

Question 6

Describe the reaction between magnesium sulfate and iron

Answer 6

No reaction

Question 7

Describe the reaction between zinc sulfate and magnesium

Answer 7

Grey solid to grey solid. Ribbon disappeared. Colourless solution to colourless solution.

Question 8

Describe the reaction between zinc sulfate and zinc

Answer 8

No reaction

Question 9

Describe the reaction between zinc sulfate and copper

Answer 9

No reaction

Question 10

Describe the reaction between zinc sulfate and iron

Answer 10

No reaction

Question 11

Describe the reaction between copper sulfate and magnesium

Answer 11

Solid grey to red brown. Blue solution to colourless

Question 12

Describe the reaction between copper sulfate and zinc

Answer 12

Grey solid to red brown. Blue solution to colourless

Question 13

Describe the reaction between copper sulfate and copper

Answer 13

No reaction

Question 14

Describe the reaction between copper sulfate and iron

Answer 14

Grey solid to red brown. Blue solution to green

Question 15

Describe the reaction between iron sulfate and magnesium

Answer 15

Grey solid to grey solid. Green solution to colourless.

Question 16

Describe the reaction between iron sulfate and zinc

Answer 16

Grey solid to grey solid. Green solution to colourless.

Question 17

Describe the reaction between iron sulfate and iron

Answer 17

No reaction

Question 18

Describe the reaction between iron sulfate and copper

Answer 18

No reaction

Question 19

Define oxidation

Answer 19

Gain of oxygen

Question 20

Define redox

Answer 20

A reaction in which both oxidisation and reduction occur

Question 21

Define reduction

Answer 21

Loss of oxygen

Question 22

What is the chemical and word equation for the thermite reaction.

Answer 22

Aluminium + iron oxide —> iron + aluminium oxide
2Al + Fe(lll)2O3 —> 2Fe + Al2O3

Question 23

Define ore

Answer 23

Contains metal compounds found in nature.

Question 24

How can you obtain a pure metal from its oxide? (When it is less reactive than carbon)

Answer 24

You react the metal oxide with carbon, carbon displaces it, leaving the pure metal behind.

Question 25

How can you extract a pure metal from its oxide? (When it is more reactive than carbon)

Answer 25

Electrolysis

Question 26

Which metals are native, what does that mean?

Answer 26

Native is that it is already naturally pure, they are below copper in the reactivity series. Eg. Lead, silver, gold

Question 27

What is the formula of rust

Answer 27

Fe2O3

Question 28

In what conditions can iron rust?

Answer 28

Water and oxygen

Question 29

Why is rust bad?

Answer 29

Iron and steel are strong and malleable, ionic compounds are brittle (rust) can no longer be used. Note: steel is an allowed of iron and carbon.

Question 30

How does physical barriers prevent rusting?

Answer 30

You cover the iron with something like paint to prevent water and oxygen from reaching the iron.

Question 31

Pro and Con of physical barriers.

Answer 31

Pro = cheap Con = worn away easily in things like railways.

Question 32

How does galvanising prevent rusting?

Answer 32

When steel and iron are coated in molten zinc. Is a combination of both physical barriers and sacrificial protection.

Question 33

How does sacrificial protection prevent rusting?

Answer 33

Covering the iron and steel with a more reactive metal. This means that the water and oxygen would react wit( the more reactive metal instead of the iron and steel.

Question 34

Pros and cons of sacrificial protection.

Answer 34

Pro = prevents rusting effectively Con = the more reactive metal gets used up quickly