Pages in this set

Page 1

Preview of page 1
THE PERIODIC TABLE
The Early Periodic Table

Newlands and Mendeleev attempted to classify the elements by arranging them in order of their atomic
weights. The list can be arranged in a table so that elements with similar properties are columns, known as
groups. The table is called a periodic table…

Page 2

Preview of page 2
alkali metal + oxygen ---------> alkali metal oxide

ALKALI SPEED WORD EQUATION SYMBOL EQUATION
METAL
Lithium Slow lithium + oxygen --> lithium oxide
Sodium Quick sodium + oxygen --> sodium oxide
potassiu Very Quick potassium + oxygen --> potassium oxide
m


Alkali metals react vigorously with water. It is an…

Page 3

Preview of page 3
metals due to reactivity. Halogen-metal compounds are salts. Further down the group they become less
reactive, have a higher melting /boiling point and become darker in colour. Properties of the halogens are:
- Poisonous And Smelly
- Non-Metals
- Poor Conductor Of Heat And Electricity
- Brittle And Crumbly When…

Page 4

Preview of page 4
Water of the correct quality is essential for life. For humans, drinking water should have sufficiently low levels
of dissolved salts and microbes. Water of the correct quality is produced by :
- Choosing an appropriate source
- Passing the water through filter beds to remove any solids
- Sterilising…

Page 5

Preview of page 5
Energy released from forming new bonds > energy needed to break existing bonds
In an endothermic reaction:
Energy released from forming new bonds < energy needed to break existing bonds

Catalysts provide a different pathway for a chemical reaction that has a lower activation energy.

Hydrogen can be burned as…

Page 6

Preview of page 6
1. Measure the known volume of the solution of alkali into a conical flask using a pipette (fill the pipette
until the bottom of the meniscus coincides with the mark).
2. Now add an indication solution (universal) into the solution in the flask.
3. Put a solution of the acid…

Page 7

Preview of page 7
RAISED Decreases Increases
TEMPERATURE
LOWERED Increases Decreases
TEMPERATURE

In gaseous reactions, an increase in pressure will favour the reaction that produces the least number of
molecules as shown by the symbol equation for that reaction. These factors, together with reaction rates,
are important when determining the optimum conditions in industrial…

Page 8

Preview of page 8
1) Many esters have pleasant smells- often quite sweet and fruity. They're also volatile. This makes
them ideal for perfumes (the evaporated molecules can be detected by smell receptors in the nose).
2) However, many esters are flammable (or even highly flammable). So their volatility also makes them
potentially dangerous.…

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »