Pages in this set

Page 1

Preview of page 1

Topic 1
Unit F335

Page 2

Preview of page 2
Meeting the demand for food with our ever growing population can be achieved by making the most
efficient use of existing agricultural land ­ particularly by improving crop varieties and planting
techniques, and making sensible use of added plant nutrients and pesticides.

What Do Plants Need For Growth?

Elements used…

Page 3

Preview of page 3
Group 5

Group 5 is in the middle of the p block.



· All of the elements have an electron configuration ending in p3
· Atoms of these elements can form 3 covalent bonds by sharing the three unpaired electrons
· This gives compounds in which the oxidation…

Page 4

Preview of page 4

Ammonia, NH3 is a nitrogen hydride.
It is formed by the reaction between N2 and H2.
The N atom forms covalent bonds by sharing one of it's electrons witch each of the 3 H atoms.
This leaves a lone pair of electrons.
This makes it available to form dative…

Page 5

Preview of page 5
Nitrogen Oxides

Nitrogen forms several oxides:

Name and Formula Appearance Origin
Nitrogen (II) oxide Colourless gas, turns to Combustion processes,
NO brown NO2 in air thunderstorms,
denitrifying bacteria in soil
Nitrogen (IV) oxide Brown gas (toxic) From oxidation of NO in
NO2 atmosphere

Dinitrogen (I) oxide Colourless gas Formed in…

Page 6

Preview of page 6
Organic farmers are governed by clear guidelines in the ways that they can add nitrogen to the soil.
The law requires food solid as `organic' to come from growers who are registered and approved by organic
certification bodies.
They must adhere to the Soil Association's standards during production.
They do…

Page 7

Preview of page 7

Page 8

Preview of page 8
Dynamic Equilibrium

A chemical reaction has a forward reaction and a backwards reaction.
It can go from reactants to products or products to reactants.

When the rate of the forward reaction is the same as the rate of the backwards reaction , a system is
said to be in dynamic…

Page 9

Preview of page 9
If a system is at equilibrium and a change is made in any of the conditions, then the system responds to
counteract the change as much as possible


Temperature change Equilibrium shift
Increase Position of equilibrium shifts in the direction of the endothermic
Decrease Position of equilibrium shifts…

Page 10

Preview of page 10

High temperatures make reactions more expensive to carry out because of the cost of furl.
Reactions go faster at higher temperatures, meaning more product will be made.


Higher pressure makes gaseous reactions go faster.
To create a high pressure, gas must be pumped into the reaction vessel.


Ivan Taptygin


Great notes! But are they not finishes? I only have 16 pages and then like 20 blank pages... :/ 

Similar Chemistry resources:

See all Chemistry resources »