Important

Question 1

How to remember the diatomic elements

Answer 1

HINClBrOF

Question 2

How to remember the Haber Process

Answer 2

HAIR

Question 3

How to remember the Ostwald Process

Answer 3

OPEN

Question 4

Why do ionic compounds conduct when in solution

Answer 4

ions are free to move

Question 5

How to remember REDOX

Answer 5

OILRIG

Question 6

What does HINClBrOF stand for

Answer 6

Hydrogen
Iodine
Chlorine
Bromine
Oxygen
Fluorine

Question 7

What does HAIR stand for

Answer 7

Haber
Ammonia
Iron
Reversible

Question 8

What does OPEN stand for

Answer 8

Ostwald
Platinum
Exothermic
Nitric Acid

Question 9

What does OILRIG stand for

Answer 9

Oxidation
Is
Loss
Reduction
Is
Gain

Question 10

How to remember the reaction between Metal and Acid

Answer 10

MASH

Question 11

what does MASH stand for

Answer 11

Metal
Acid
Salt
Hydrogen

Question 12

Vinegar is a solution of

Answer 12

ethanoic acid

Question 13

solution

Answer 13

produced when a solute is dissolved in a solvent

Question 14

solute

Answer 14

is dissolved

Question 15

solvent

Answer 15

does the dissolving

Question 16

In industry, calcium oxide is reacted with sulfur dioxide to reduce the volume of sulfur dioxide released into the atmosphere.

Explain why calcium oxide is able to reduce the volume of sulfur dioxide released

Answer 16

calcium oxide is base, so forms an alkaline solution when dissolved in water
It will neutralise the sulfur dioxide

Question 17

Explain the change in the pH of the solution as sulfur dioxide dissolves

Answer 17

pH of solution decreases below 7 because the H+ ion concentration goes up

Question 18

Half life of Americium-242 = 16 hours
Half-life of Americium-241= 432 years

Why do smoke detectors use americium-241 and not americium-242?

Answer 18

Americium 242 has a longer half life so will not be need to be replaced as often

Question 19

The next step involves separating pure titanium(IV) chloride from other liquid impurities that are also produced during the first step.

Suggest a name for this process

Answer 19

Distillation

Question 20

TiO2 +2Cl2 +2C –> TiCl4 +2X
Identify X

Answer 20

CO

Question 21

The Sodium Chloride can be electrolysed. Suggest how this could make the extraction of titanium from titanium oxide more economical

Answer 21

The products can be recycled

Question 22

What is ‘a solution of accurately known concentration’ the definition of?

Answer 22

Standard Solution

Question 23

what two elements are liquid at room temperature

Answer 23

bromine and mercury

Question 24

H2O(l) ⇋ H+(aq) + OH- (aq)

Answer 24

dissociation of water

Question 25

hydration of an alkene turns it into an

Answer 25

alcohol

Question 26

hydrogenation of an alkene turns it into an

Answer 26

alkane

Question 27

how many covalent bonds does oxygen have

Answer 27

2

Question 28

how many covalent bonds does nitrogen have

Answer 28

3

Question 29

What is the ion electron equation for a nitrogen ion forming a nitrogen atom?

Answer 29

N3- ----> N + 3e

Question 30

What will happen to bromine water if an alkane is added to it?

Answer 30

nothing

Question 31

What is broken during an addition reaction?

Answer 31

A C=C bond

Question 32

priority of functional groups

Answer 32

1. Carboxyl 2. Hydroxyl 3. Carbon to Carbon double bond 4. Branches

Question 33

covalent network elements

Answer 33

carbon (diamond) carbon (graphite) silicon boron

Question 34

covalent network substances

Answer 34

silicon dioxide (SiO2)

Question 35

ion

Answer 35

a charged particle

Question 36

a fuel

Answer 36

burns in oygen to release energy, producing carbon dioxide and water

Question 37

isotopes

Answer 37

atoms of the same element (same atomic number) but with different mass numbers

Question 38

a standard solution

Answer 38

a solution of accurately known concentration

Question 39

how soluble is ammonia

Answer 39

very soluble

Question 40

How many moles are there in 24g of carbon?

Answer 40

2 moles

Question 41

equimolar

Answer 41

same concentration

Question 42

equations for making a standard solution

Answer 42

1. Number of moles (n=cV) 2. Work out formula 3. Work out the GFM of the subbstance 4. Work out mass of substance needed (m=n*GFM)

Question 43

A solution of known concentration is added to a set volume of the solution of unknown concentration until the reaction is neutralised. The end point is normally determined by a colour change. The unknown concentration can then be calculated This is what happens during

Answer 43

a titration