AQA Chemistry Units 1-3 Revision Guide/Notes

These are the PDF version of my notes.

My teacher is quite bad so I had to make my own notes and this is what I ended up with and I thought I should share it with you.

It's all the curriculum, units 1-3.

Hope it helps!

Good luck with all your exams!

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  • Created on: 19-05-10 16:14
Preview of AQA Chemistry Units 1-3 Revision Guide/Notes

First 55 words of the document:

1) Unit I
Products from Rocks
Earth & Atmosphere
2) Unit II
Bonding & Reactions Electrolysis
Nanoscience & Nanotechnology Salts
Quantitative Chemistry
Rate Of Reactions
3) Unit III
Development of Periodic Table
Acids & Bases
Energy Calculations

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Products from Rocks:
Limestone containing the compound Calcium Carbonate (CaCO3) is quarried and can be used as a building
When Limestone is heated strongly, it decomposes to give solid quicklime and carbon dioxide gas. When a
small amount of water is added to quicklime it becomes slaked lime. When more water is added to slaked lime
it becomes limewater and when carbon dioxide is bubbled through limewater, limestone is formed again along
with water.…read more

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Limestone is used in power station chimneys to Limestone needs to be transported away by
neutralise sulphur dioxide, which is a cause of large lorries which cause more pollution and
acid rain. noise.
Once quarrying is complete, landscaping and It makes large holes which permanently change
restoration is usually required as part of the the shape of the environment.
planning permission.
It creates lots of dust and noise.
It destroys habitats of birds and animals.…read more

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Metals Reactivity
(In decreasing order of reactivity)
Potassium Extract by electrolysis
Zinc Extract by reaction with Carbon
Iron or
Tin Carbon Monoxide
Copper Extracted by various chemical reactions
Silver [Note: Gold because it is so unreactive, is found as the
Gold native metal and not as a compound, so it does not need
Platinum to be chemically separated.…read more

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Limestone Calcium helps to remove acidic impurities from the iron by reacting with
Carbonate them to form molten slag
Air Oxygen allows the coke to burn, and so produces heat and carbon
Pure iron is soft and easily shaped. This is because its atoms are arranged
in a regular way that lets layers of atoms slide over each other. Pure iron is too
soft for many uses.…read more

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The Transition Metals:
You need to know where to find the transition metals in the periodic table. The transition metals are found
in the large block between Groups 2 and 3 in the periodic table. Most metals are placed here, including iron,
titanium, copper and nickel.
The transition metals have these properties in common:
They are metals.
They form coloured compounds.
They are good conductors of heat and electricity.
They can be hammered or bent into shape easily.…read more

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Aluminium extraction is expensive because the process needs a lot of electrical energy. Titanium extraction
is expensive because the process involves several stages and a lot of energy. This especially limits the uses of
Why is cryolite used in the extraction of Aluminium: It lowers the melting point of Aluminium Oxide/Aluminium
Oxide is dissolved in molten cryolite.…read more

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Alkane Molecular Formula Displayed/Structural Formula
Methane CH4
Ethane C2H6
Propane C3H8
Butane C4H10
Alkanes are saturated hydrocarbons. This means that their carbon atoms are joined to each other by single
bonds. This makes them relatively unreactive, apart from their reaction with oxygen in the air, which we call
burning or combustion.
Hydrocarbons have different boiling points, and can be solid, liquid or gas at room temperature:
Small hydrocarbons with only a few carbon atoms have low boiling points and are gases.…read more

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Note: The gases condense at the top of the column, the liquids in the middle and the solids stay at the bottom.
How Fractional Distillation Works: Components of the mixture are vapourised and each component has a different
boiling point so, when passed through the fractionating column which has a temperature gradient, the high boiling point
fractions condense before the low boiling point fractions.…read more

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They may die as a result. Acid rain
also makes rivers and lakes too acidic for some aquatic life to survive.
Sulphur dioxide can be removed from waste gases after combustion of the fuel. This happens in power
stations. The sulphur dioxide is treated with powdered limestone to form calcium sulphate. This can be used to
make plasterboard for lining interior walls, so turning a harmful product into a useful one.
Sulphur can be removed from fuels at the oil refinery.…read more


sophie raeburn



how did you find the chemistry unit 1/2/3 exams? whichever you took? x thanks for the notes you're a lifesaver

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