Chemsitry - Metals

Question 1

Typical properties of metals

Answer 1

High melting points
High boiling points
Solid at room temperature
High density
Good electrical conductor
Good heat conductor
Malleable
ductile
shiny

Question 2

What is a catalust?

Answer 2

A substance used to change chemical reactions (rate of reaction) without being used up

Question 3

What is the name of the transition metal used in the manufacture of ammonia?

Answer 3

Iron

Question 4

What transition metal is used in catalytic converters in vehicle exhausts?

Answer 4

Platinum

Question 5

What colour is a compound containing Fe (2+)

Answer 5

Pale green

Question 6

What colour is a compound containing Fe(3+)

Answer 6

Yellow

Question 7

What colour is a compound containing Cu(2+)

Answer 7

Blue

Question 8

What is an alloy?

Answer 8

Chemically combined (2 or more) metals that are mixed when molten(melted)

Question 9

Why are alloys useful?

Answer 9

Because their properties are stronger than a single metal by itself

Question 10

Why is the alloy, Steel, more useful than Iron?

Answer 10

Lighter
Stronger
Harder

Question 11

How is iron turned into steel

Answer 11

By adding carbon to remove the oxygen

Question 12

What metal is used for bridges and cars and why

Answer 12

Steel because it is strong and doesnt rust

Question 13

What metal is used for drills, cutlery and spades and why

Answer 13

Steel because its hard

Question 14

What metal is used for overhead power cables and why

Answer 14

Aluminium because it
Conducts electricity well
Low density
Doesnt rust

Question 15

What metal is used for aeroplanes and why

Answer 15

Aluminium because its low density

Question 16

What metal is used for window frames and why

Answer 16

Aluminium because its
Low density
Strong
Doesnt rust

Question 17

What metal is used for saucepans and why

Answer 17

Copper because
Good conductor of heat
High melting point

Question 18

What metal is used for electrical wires and why

Answer 18

Copper because
Good electricity conductor
Ductile

Question 19

What metal is used for water pipes and why

Answer 19

Coppr because
Doesnt rust
High melting point

Question 20

What metal is used for high speed aircrafts and why

Answer 20

Titanium because
Strong
Doesnt rust

Question 21

Put these metals in order of reactivity from highest to lowest
Ag, Fe, Cu, Zn

Answer 21

Zn
Fe
Cu
Ag

Question 22

When does a displacement reaction happen

Answer 22

When one metal is more reactive than another so it replaces it

Question 23

Explain metal extraction

Answer 23

Metals are found in the earths crust

The most unreactive metals, such as Gold, can be dug up straight from the ground. This is because they do not react with substances around them to make compounds

More reactive mets form compounds with other substances and as a result we have to extract these metals using chemical reactions.

The more reactive the metal the harder it is to extract, many are extracted using competition reactions.

Question 24

What is put into the top of a blast furnace when extracting iron?

Answer 24

Haemetite (iron ore)
Coke
Limestone

Question 25

What products are made from using the blast furnace to extract iron?

Answer 25

Hot air
Slag
Iron (molten)

Question 26

What is the meaning of electrolysis

Answer 26

To split substances using electricity

Question 27

What is electrolysis used on

Answer 27

Metals that are more reactive than carbon

Question 28

For electrolysis to work the compounds must be _______

Answer 28

Aqueous (so that the ions can move)

Question 29

What carry the current into the electrolyte in electrolysis

Answer 29

Electrodes

Question 30

Is the anode positive or negative

Answer 30

Positive

Question 31

Is the cathode positive or negative

Answer 31

Negative

Question 32

Oxidation is the _____ of electrons

Answer 32

Loss

Question 33

Reduction is the _____ of electrons

Answer 33

Gain