87333
Descrição
Mapa Mental por jodieamelia, atualizado more than 1 year ago
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Criado por jodieamelia
aproximadamente 11 anos atrás
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Group 2
- physical properties
- reasonably high melting point
- light metals with low density
- form colourless compounds
- reasonably high melting point
- reaction with oxygen:
redox reaction
- e.g. 2Ca (s) + O2 (g) ------> 2CaO (s)
- Metal + oxygen forms Metal oxide
- Metal + oxygen forms Metal oxide
- e.g. 2Ca (s) + O2 (g) ------> 2CaO (s)
- reaction with water
- Metal + water forms Metal hydroxide and hydrogen
- observation: solid dissolves
- Metal + water forms Metal hydroxide and hydrogen
- oxides/hydroxides + acid -----> base + water
- observation: solid dissolves
- observation: solid dissolves
- thermal Decomposition: decomposed by heat
to form metal oxide and carbon dioxide gas
- uses of hydroxides
- calcium hydroxide: used as lime to neutralise acid soils
- magnesium hydroxide: used to relieve indigestion, by
neutralising stomach acid
- calcium hydroxide: used as lime to neutralise acid soils
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