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Group 2: Alkaline Earth Metals
Inorganic
AS
Grp 2: Alkaline Earth Metals
AQA Content
explain the trends in atomic radius and first ionisation energy
explain the melting point of the elements in terms of their structure and bonding.
explain why BaCl2 solution is used to test for sulfate ions and why it is acidified.
Specification Notes
The trends in atomic radius, first ionisation energy and melting point of the elements Mg–Ba
The reactions of the elements Mg–Ba with water.
The use of magnesium in the extraction of titanium from TiCl4
The relative solubilities of the hydroxides of the elements Mg–Ba in water.
Mg(OH)2 is sparingly soluble.
The use of Mg(OH)2 in medicine and of Ca(OH)2 in agriculture.
The use of CaO or CaCO3 to remove SO2 from flue gases.
The relative solubilities of the sulfates of the elements Mg–Ba in water.
BaSO4 is insoluble.
The use of acidified BaCl2 solution to test for sulfate ions.
The use of BaSO4 in medicine.
Notes
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