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CHEMISTRY REVISION

Periodic table

All the elements on the Earth are on the Periodic Table.
They are arranged according to patterns in their properties e.g. The masses of their atoms
The relative atomic mass is the mass of an atom in relation to hydrogen e.g. Helium has an
atomic mass…

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Anyone using a corrosive substance should wear gloves and eye protection, such as goggles
or a face shield.
Anyone using an irritant substance should wear eye protection such as goggles, and they
should take care to wash any spills off their skin immediately.
Anyone who uses a toxic chemical needs…

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Melting point 63 degrees
Boiling point 760 degrees
When reacting with oxygen it makes Potassium oxide.
When burning it creates a lilac pink flame
When reacting with water it produces Potassium Hydroxide + Hydrogen and makes little
sparks. The water doesn't change colour. The reaction is more vigorous than the…

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Cl2 + 2NaBr 2NaCl + Br2. As chlorine is more reactive than bromine it displaces bromine to
make sodium chloride and bromine is left on its own.
Iodine however cannot displace Bromide as it is not as reactive so I2 + 2NaCl ---àNo reaction
Chlorine is more reactive then iodine…

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Ionic Bonding:

Transferring electrons.
A shell with just one electron wants to get rid of it.
o Atoms in groups 1,2 and 3 all have just 1,2 or 3 electrons which they want to get rid
of.
o When they do, ions really want to bond.
A shell with 1,…

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o In aqueous solutions as well as the ions from the solute there are H+ ions and OH- ions.
Sometimes it's easier to discharge the ions from the water instead of the ones from the
solute. This means hydrogen could be produced from the cathode and oxygen at the
anode.…

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Then you need to repeat the whole experiment a few times, making sure you
get approximately that same answer each time.
o Single indicators are used for titrations:
Universal indicator is used to estimate the pH of a solution because it can turn a
variety of colours. Each colour indicates…

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Iron I

Tin Think

Lead Love

Copper Can

Silver Stop

Gold Global

Platinum Peace

o The further apart the metals are in the reactivity series, the higher the temperature
change in the displacement reaction.




Property of SiO2 Comments Uses

Very hard Strong, rigid structure; will Sandpaper and scouring
scratch steel…

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The earth's lithosphere is made of a mixture of minerals.
o Made of a mixture of minerals often containing silicon, oxygen and aluminium.
o Different rocks contain different elements.
Silicon dioxide forms a giant covalent structure.
o Giant covalent structures contain no charged ions.
o They are very hard, high…

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o Metallic bonds are strong so it takes a lot of energy to break them.



Synthesising Compounds:

Seven Stages involved in chemical synthesis. When making these chemicals in chemical
synthesis you have to choose the right process.
o Choosing the reaction:
Neutralisation for a salt?
Thermal decomposition ­ make a…

Comments

lisa linsdell

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Comprehensive revision notes for these three topics. Contains a neat little memory aid for the reactivity series and redox reactions, Do watch out for the odd spelling and grammar errors, e.g larger surface area not higher surface area. Overall, a good aid for revision

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