5.2 Displacement reactions
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Whats a displacement reaction
When a more reactive metal displaces a less reactive metal
What is oxidation
loss of electrons, reacted with oxygen
What is reduction
Gain of electrons, oxygen removed
Silver is less reactive than copper. Predict what you would observe when a sample of copper metal is added to the silver nitrate solution
Copper will displace silver from a solution of silver ions because it is more reactive
When a sample of aluminium reacts with a solution of copper sulfate the blue solution gradually turns colourless and a brown solid appears. Explain these observations in terms of the reactivity series
• aluminium sulfate is formed which is colourless • aluminium displaces copper as it is higher in the reactivity series. • Cu2+ ions displaced from solution (blue will disappear) • Cu metal is formed to a brown solid