Patterns Of Reactivity

Question 0

Where do metals react in the environment?

Answer 0

With substances eg air, water or acids.

Question 1

Which gas in the air reacts with metals most easily?

Answer 1

Oxygen

Question 2

What are reactive metals?

Answer 2

Metals that react quickly and easily.

Question 3

What are unreactive metals?

Answer 3

Metals that do not react very easily or quickly.

Question 4

Where are the most reactive metals found?

Answer 4

On the left hand side of the periodic table.

Question 5

Where are less reactive meals found?

Answer 5

In the centre of the periodic table.

Question 6

Which the most reactive gas in air?

Answer 6

Oxygen

Question 7

Which gas is not very reactive?

Answer 7

Nitrogen

Question 8

What happens when metals react with oxygen in the air?

Answer 8

They form oxides.

Question 9

What is the word equation when metals form oxides?

Answer 9

Metal + oxygen ➡️ metal oxide

Question 10

What do metals react quickly with if they react with air?

Answer 10

Water

Question 11

What happens when metals react with water?

Answer 11

They form hydrogen gas and a metal hydroxide.

Question 12

What is the word equation for metals reacting with water?

Answer 12

Metal + water ➡️ metal hydroxide + hydrogen

Question 13

What do metals that react quickly with water also react quickly with?

Answer 13

Air and acid

Question 14

Some metals that don’t react with water….

Answer 14

React with acid

Question 15

What do metals produce when they react with acids?

Answer 15

Hydrogen and a salt

Question 16

What is the word equation for metals and acids?

Answer 16

Metal + acid ➡️ salt + hydrogen.

Question 17

Sulphuric acid makes…

Answer 17

Sulphates

Question 18

Nitric acid makes…

Answer 18

Nitrates

Question 19

Hydrochloric acid makes…

Answer 19

Chlorides

Question 20

What is the reactivity series?

Answer 20

Metals can be placed into a reactivity series where the most reactive metals are placed at the top of the table. The reactivity series can also be used to predict whether reactions will occur.

Question 21

Name the first 11 metals in the reactivity series

Answer 21

Potassium 
Sodium
Calcium
Magnesium
Aluminium 
Zinc
Iron
Lead
Copper
Silver 
Gold

Question 22

More reactive metals can…

Answer 22

Displace less reactive metals from their compounds.

Question 23

What happens in a displacement reaction?

Answer 23

The more reactive reactive metal will steal the other metals compound to form it’s own compound, leaving the other metal as a pure element.

Question 24

Example of a displacement reaction:

Answer 24

Iron + copper chloride ➡️ iron chloride + copper

Question 25

What happens if you react zinc chloride and iron?

Answer 25

No reaction.

Question 26

What can you use displacement reactions for? Give an example

Answer 26

To work out the order of the reactivity series. For example, zinc will displace lead from a compound, so we know that zinc is more reactive than lead.

Question 27

Metals used for construction need...

Answer 27

A low reactivity or they would corrode away.

Question 28

Aluminium has...

Answer 28

A natural protective oxide layer.

Question 29

Iron has...

Answer 29

To be protected from corrosion eg by painting.

Question 30

Low reactivity metals have...

Answer 30

Been known for thousands of years because they can be extracted by heating their compounds in a fire.

Question 31

More reactive metals are discovered by...

Answer 31

Electrolysis. This means they have been discovered in the last 200 years, since the invention of the electric battery.

Question 32

What is a very important property of metals?

Answer 32

Reactivity

Question 33

What is aluminium used for?

Answer 33

It is used for aircraft as it is very lightweight. Also it had a protective oxide layer to stop corrosion.

Question 34

What is bronze used for?

Answer 34

Sculptures. It has a low reactivity but would last for a long time. It is quite expensive but a cheaper metal like iron would rust easily. (Unless it is painted)

Question 35

What is the word equation for acid and metal carbonate?

Answer 35

Acid + metal carbonate ➡️ salt + water + carbon dioxide.

Question 36

What is iron used for?

Answer 36

For building structures. It isn't light but doesn't corrode which can make the structure expensive. Normally it is cheap to use though.

Question 37

What is gold used for?

Answer 37

Gold is used for rings because it doesn't corrode and also looks attractive. It is expensive because it is rare.