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12: Electrolysis
13: Ion Analysis
14: Bonding
15: Important Ions
16: Reactivity Series
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Chemistry Free Revision Notes
11: Chemical Changes
Thermal Decomposition
A single substance is broken down by heating. A good example of this is the cracking of hydrocarbons.
Displacement
When one more reactive element pushes another less reactive el
12: Electrolysis
This is the (chemical) process by which a compound in its molten state
is decomposed to form its elements. Some of its uses are as follows:
Extraction of reactive metals from their ore. (e.g. - alumin
13: Ion Analysis
Testing for Cations
Cations are positively charged (+) ions. There are 2 basic tests for them:
Flame test
Adding NaOH (aq) to solution of ionic compound
The flame test involves a clean nichrome
14: Bonding
Metallic Bonding
This occurs in metals and is when electrons are given out from the
metal atoms to make a "sea" of free electrons in between all of the
metal atoms. These free electrons hol
15: Important Ions
The table below lists some important ions that you should really know about:
Name of Ion
Formula
Hydroxide
OH (-)
Carbonate
CO3 (-2)
16: Reactivity Series
The following list shows how reactive different elements are in
relation to each other. This is a shortened list but contains most of
the elements that you need to know about.
Potassium
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