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 by: ADB :)
  • Created on: 19-05-10 16:14

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Page 1

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1) Unit I
Products from Rocks
Oils
Earth & Atmosphere

2) Unit II
Bonding & Reactions Electrolysis
Nanoscience & Nanotechnology Salts
Quantitative Chemistry
Rate Of Reactions
Equilibrium

3) Unit III
Development of Periodic Table
Acids & Bases
Water
Energy Calculations
Analysis

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UNIT I

Products from Rocks:
Limestone:

Limestone containing the compound Calcium Carbonate (CaCO3) is quarried and can be used as a building
material.
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…

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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…

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Metals Reactivity
(In decreasing order of reactivity)
Potassium Extract by electrolysis
Sodium
Calcium
Magnesium
Aluminium
Carbon
Zinc Extract by reaction with Carbon
Iron or
Tin Carbon Monoxide
Lead
Hydrogen
Copper Extracted by various chemical reactions
Silver [Note: Gold because it is so unreactive, is found as the
Gold native metal…

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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
monoxide



Steel:

Pure iron is soft and easily shaped. This is because its atoms are arranged
in a…

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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…

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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
titanium.

Why is cryolite used in the extraction of Aluminium: It lowers the melting point of…

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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…

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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…

Page 10

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more difficult for trees to absorb the minerals they need for healthy growth. 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…

Comments

sophie raeburn

lol

Zarlush

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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