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Group 2 The Alkali Earth Metals
Group 2 The Alkali Earth Metals : Reactions
1. With oxygen gas
The metal oxide is produced.
The metal will burn with a characteristic colour. Magnesium gives a bright white flame, calcium a dark red flame, strontium a crimson flame and barium a pale green flame.
Formation of the oxide:
2. With water
Calcium will react with cold water. Magnesium will react with hot water or steam.
3. With acids
The metal salt is produced in solution and hydrogen gas is liberated. The reaction below shows magnesium with hydrochloric acid.
4. With hydrogen
Calcium, with gentle heating, will react with hydrogen gas to form calcium hydride.
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