Unit 3

Question 1

How do bonds hold toms together in metallic bonding?

Answer 1

The force of attraction between positive metal ions and the delocalised electrons holds the atoms together

Question 2

Why can metals conduct electricity

Answer 2

They can conduct electricity becuase they have electrons which are free to move

Question 3

Electrolyte

Answer 3

Electricallly conduction solutions containing ions

Question 4

Ores

Answer 4

Naturally occurring metal compounds found in rocks

Question 5

Electrolysis

Answer 5

Decomposition of an ionic compound into its element using electricity

Question 6

Why would D.C. power supply be used

Answer 6

So that the products at each electrode can be identified

Question 7

What’s the purpose of an ion bridge

Answer 7

To allow ions to flow and complete circuit

Question 8

What is the industrial process used to produce ammonia

Answer 8

The Haber Process

Question 9

Name 3 essential elements required for healthy plant growth

Answer 9

• nitrogen
• potassium
• phosphorus

Question 10

Why must fertilisers be soluble in water

Answer 10

So they can be absorbed by root of plants

Question 11

Polymers

Answer 11

Long chain molecules formed by joining together a large molecule of small molecules called monomers

Question 12

Monomers

Answer 12

Molecules used to make a much larger molecule.

Question 13

Addition polymerisation

Answer 13

Name given to a chemical reaction in which unsaturated monomers are joined, forming a polymer.

Question 14

Most accurate way to measure volumes

Answer 14

• pipettes
• burette

Question 15

What is ammonia

Answer 15

An important compounds used to produce soluble, nitrogen containing salts that can be used as fertilisers

Question 16

What is meant by a base

Answer 16

A substance that neutralises an acid

Question 17

Oxidation

Answer 17

reaction in which a reactant loses electrons

Question 18

Reduction

Answer 18

Reaction in which a reactant gains electrons

Question 19

Redox

Answer 19

Reaction where oxidation takes place at the same time as reduction

Question 20

What are Alpha particles made of

Answer 20

Consists of two protons and two neutrons nd carry a double positive charge

Question 21

What is alpha particles range

Answer 21

They have a range of only a few centimetres in air and are stopped by a peice of paper

Question 22

What will alpha particles made be attracted towards

Answer 22

Wil be attracted towards a negatively charged plate

Question 23

Ammonia

Answer 23

Pungent, clear, colourless gas which dissolves in water to produce an alkaline solution

Question 24

What’s re beta particles made from

Answer 24

They are electrons ejected from the nucleus of an atom

Question 25

What do beta particle have a range of

Answer 25

Able to travel over a metre in air but can be stopped by a thin sheet of aluminium

Question 26

What are beta particles attracted to

Answer 26

Attracted towards a positively charged plate

Question 27

Concordant

Answer 27

Titre volumes within 0.2cm3

Question 28

Extraction of metals

Answer 28

Metal ions are reduced forming metal atoms

Question 29

Fertilisers

Answer 29

Substances which restore elements essential for healthy plant growth

Question 30

What are Gamma rays made of

Answer 30

Electromagnetic waves emitted from within the nucleus of an atom

Question 31

What do Gamma rays have a range of

Answer 31

Able to travel great distances in air. Can be stopped by barriers made of materials such as lead or concrete

Question 32

What are Gamma rays not deflected by

Answer 32

An electric field

Question 33

Haber process

Answer 33

Used to produce the ammonia required for fertilisers production

Question 34

Ion bridge

Answer 34

An ‘ion bridge’ (salt bridge) can be used to link the half-cells. Ions can move across the bridge to complete an electrical circuit

Question 35

Metallic Bonding

Answer 35

Electrostatic force of attraction between positively charged ions and delocalised electrons

Question 36

Ostwald Process

Answer 36

Uses ammonia, oxygen and water to produce nitric acid. A platinum catalyst is used in this process.

Question 37

Precipitation reaction

Answer 37

Reaction of two solutions to form an insoluble salt called a precipitate

Question 38

Redox Reaction

Answer 38

Both reduction and oxidation take place at the same time

Question 39

Repeating Unit

Answer 39

The shortest section of polymer chain which, if repeated, would yield the complete polymer chain (except for the end-groups).

Question 40

Standard solutions

Answer 40

Solutions of accurately known concentration are known as standard solutions.

Question 41

Titration

Answer 41

A technique used to determine, accurately, the volumes of solution required to reach the end-point of a chemical reaction.