1.3.2 GROUP 2

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What is produced when a group 2 metal undergoes redox with oxygen?
group 2 oxidised // produces white solid oxide
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What is produced when a group 2 metal undergoes redox with water?
group 2 oxidised // produces metal hydroxide and hydrogen
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Describe the trend in reactivity down group 2
increases // ionisation energy decreases // they lose 2 electrons to become 2+ ions easily due to large atomic size, shielding and less nuclear attraction
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What happened when group 2 oxides react with water?
react readily to form metal hydroxides// hydroxide then dissolves in H2O // releases OH- and 2+ ions// OH makes water alkaline
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How is magnesium oxide different to the other group 2 oxides?
reacts slowly // hydroxide produced is not very soluble // less alkaline
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What is produced when group 2 carbonates thermally decompose?
produces metal oxide and CO2
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describe the thermal stability of group 2 carbonates
increases down the group // makes harder to decompose thermally
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What is thermal stability?
the more stable a substance is, more heat is required to break it down
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What is thermal decomposition?
substance breaks down when heated
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What are the uses of group 2 compounds?
Calcium hydroxide - agriculture neutralises acidic soil, very alkaline so must be used in moderation // Magnesium Hydroxide - indigestion tablets, neutralises excess stomach acid
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Card 2

Front

What is produced when a group 2 metal undergoes redox with water?

Back

group 2 oxidised // produces metal hydroxide and hydrogen

Card 3

Front

Describe the trend in reactivity down group 2

Back

Preview of the front of card 3

Card 4

Front

What happened when group 2 oxides react with water?

Back

Preview of the front of card 4

Card 5

Front

How is magnesium oxide different to the other group 2 oxides?

Back

Preview of the front of card 5
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