Page 134 - Knowledge Organiser Yr8 24-25

Knowledge Base: Science 8.5 Reactivity Year 8
3. Reactivity Series
3.1
Metals that easily take part in a chemical reaction are called ________
Reactive.
3.2
Metals that don’t easily take part in a chemical reaction are called ________
Unreactive.
3.3
Magnesium and acid produces vigorous bubbling whereas zinc and acid produces slow bubbling. Which metal is more reactive?
Magnesium.
3.4
What is the reactivity series?
A list of metals from the most reactive down to the least reactive.
3.5
Write out the reactivity series from the most to the least reactive metal.
3.6
Which metal would you use
for jewellery – silver or zinc – and why?
Silver because it is less reactive and so will not react with the oxygen in the air.
4. Displacement Reactions
4.1
What is a displacement reaction?
Where a more reactive metal takes the place of a less reactive metal in its compound during a chemical reaction
4.2
Give two examples of evidence that a displacement reaction is taking place.
• The reacting metal ‘disappearing’
• Change of colour of solution
• Deposit of new metal appearing (product) • Change in temperature
4.3
Use the reactivity series to predict the products of the following reactions
a) copper oxide + magnesium →
b) aluminium + silver chloride →
c) sodium chloride + aluminium → d) lead chloride + iron →
a) magnesium oxide + copper b) aluminium chloride + silver c) No reaction
d) iron chloride + lead
4.4
Balance the symbol equation for the following displacement reaction. Draw particle diagrams to show that no atoms have been lost or created during the reaction.
Al + AgCl → AlCl3 + Ag
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