Group 2

What are the physical properties of group 2 elements?
High melt and boil points, light metals with low densities, form white compounds
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How does group 2 metals react with oxygen?
Redox reactions to form oxides. Reaction is more vigorous going down the groups
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How does group 2 metals react with water?
Redox reaction to form a hydroxide and hydrogen gas
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How does group 2 metals react with acids?
Redox react to form a salt and hydrogen gas. Reaction is more vigorous going down the group
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What is the pattern in ionisation energies?
Decreases going down the group
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Why does this pattern occur?
Increased shielding and atomic radius outweighs increased nuclear charge
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What increases going down the group 2 hydroxides?
Solubility and alkalinity
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What decreases going down group 2 sulphates?
Solubility
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What is calcium hydroxide used for?
Neutralising acidic soils
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What is magnesium hydroxide used for?
Relieving indigestion
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What is magnesium sulphate used for?
Epsom salts/bath bombs
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What is barium sulphate used for?
Barium drink taken for a gut x-ray so faeces can be seen
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Why can't titanium be extracted using carbon?
It forms titanium carbide (TiC)
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How is titanium extracted?
Reacted with chlorine and carbon to form titanium chloride & carbon monoxide, then reacted with magnesium in displacement reaction
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What is titanium used for?
Aerospace industry and hip joints
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How do you test for sulphate ions?
Add nitric acid to remove carbonate ions, add barium chloride to form a white precipitate
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Why must carbonate ions be removed?
They form a white precipitate ion with barium as well
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Other cards in this set

Card 2

Front

How does group 2 metals react with oxygen?

Back

Redox reactions to form oxides. Reaction is more vigorous going down the groups

Card 3

Front

How does group 2 metals react with water?

Back

Preview of the front of card 3

Card 4

Front

How does group 2 metals react with acids?

Back

Preview of the front of card 4

Card 5

Front

What is the pattern in ionisation energies?

Back

Preview of the front of card 5
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