Metals

Question 1

What is metallic bonding

Answer 1

Electrostatic attraction between metal ions and a sea of delocalised electrons

Question 2

What are delocalised electrons

Answer 2

Electrons that are free to move throughout the metal lattice

Question 3

Why do metals conduct electricity

Answer 3

Delocalised electrons can move and carry charge

Question 4

Why are metals malleable

Answer 4

Layers of metal ions can slide while metallic binding remains

Question 5

What is the reactivity series

Answer 5

A list of metals in order of how reactive they are

Question 6

How are very reactive metals extracted

Answer 6

By electrolysis

Question 7

How are moderately reactive metals extracted

Answer 7

By heating with carbon

Question 8

How are unreactive metals extracted

Answer 8

By heating alone

Question 9

Metal + oxygen =

Answer 9

Metal oxide

Question 10

Metal + water =

Answer 10

Metal hydroxide + hydrogen

Question 11

Metal + acid =

Answer 11

Salt + hydrogen

Question 12

How to test for hydrogen gas

Answer 12

Burns with squeaky pop

Question 13

What is a displacement reaction

Answer 13

A more reactive metal displaces a less reactive metal from a compound

Question 14

How do you predict displacement reactions

Answer 14

Use the electrochemical series

Question 15

Will silver displace copper from copper sulfate

Answer 15

No silver is less reactive

Question 16

What is oxidation

Answer 16

Loss of electrons

Question 17

What is reduction

Answer 17

Gain of electrons

Question 18

What does OIL RIG stand for

Answer 18

Oxidation is loss, reduction is gain (of electrons)

Question 19

What is a redox reaction

Answer 19

A reaction involving transfer of electrons

Question 20

How is oxidation written in ion-electron equations

Answer 20

Electrons on the right hand side

Question 21

How is reduction written in ion electron equations

Answer 21

Electrons on left hand side

Question 22

How are reactions written in the electrochemical series

Answer 22

All as reductions

Question 23

What do you do to write an oxidation equation from the ECS

Answer 23

Reverse the equation

Question 24

Steps to write redox equation

Answer 24

Find ion electron equations

Reverse the higher one

Balance electrons

Combine

Cancel electrons

Question 25

Should electrons appear in the final redox equation

Answer 25

No they must cancel out

Question 26

What is an electrochemical cell

Answer 26

A device that converts chemical energy into electrical energy

Question 27

What is an electrolyte

Answer 27

A solution containing ions that conducts electricity

Question 28

What is an electrode

Answer 28

A solid conductor (metal or graphite)

Question 29

What is an ion bridge

Answer 29

A connection soaked in electrolyte that completes the circuit

Question 30

What flows through the ion bridge

Answer 30

Ions

Question 31

What flows through the wires

Answer 31

Electrons

Question 32

Where do electrons flow from

Answer 32

From metal higher in ECS

Question 33

Where to electrons flow to

Answer 33

The metal lower in the ECS

Question 34

Which metals give the highest voltage

Answer 34

Metals furthest apart in the ECS

Question 35

Where does oxidation happen in a cell

Answer 35

At the electrode losing electrons

Question 36

Where does reduction happen in a cell

Answer 36

At the electrode gaining electrons

Question 37

What happens to the zinc electrode in a Zn/Cu cell

Answer 37

It loses mass (oxidation)

Question 38

What happens to copper in a Zn/Cu cell

Answer 38

Is gains mass (reduction)

Question 39

What happens to mass of more reactive metals

Answer 39

Loses mass (atoms leave and go into solution)

Question 40

What happens to mass of less reactive metal

Answer 40

Gains mass (sticks into electrode)

Question 41

Why is DC used in electrolysis

Answer 41

It flows in one direction so ions move to the correct electrodes and are discharged.