Reactivity Series: Displacement Reactions
Reactivity Series: Displacement Reactions
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Reactivity Series: Displacement Reactions
What do you already know about metals reacting with other substances?
Ionic bonding vs Covalent
Ionic bonding
Covalent bonding
Occurs between 2 non-metals
Occurs between a metal & a non-metal
Involves the transfer of an electron
Involves the sharing of electrons
Learning Objective
At the end of the lesson you will be able to describe and explain single displacement reactions, use the reactivity series to predict outcomes, and write word equations for these reactions.
What is the Reactivity Series?
The reactivity series is a list of metals arranged by how easily they react. It helps us predict which metals will react with others in chemical reactions.
Fill in the blanks
A displacement reaction occurs when a more reactive element displaces a less reactive element from a compound. For example mangesium + copper oxide --> magnesium oxide + copper.
Defining Displacement Reactions
A displacement reaction is when a more reactive metal replaces a less reactive metal from its compound.
Important Terms
- Reactivity: How easily a metal reacts. - Element: A pure substance made of one type of atom. - Compound: Two or more elements bonded together.
Single Displacement Example
If iron nails are placed in copper sulphate solution, iron is more reactive than copper, so iron will displace copper, forming iron sulphate and copper metal.
Word Equation of a Displacement Reaction
metal A + compound of B → compound of A + metal B
Example
Iron + Copper sulphate → Iron sulphate + Copper
General Formula
Using the Reactivity Series
You can use the reactivity series to check if a displacement reaction will happen. Only a more reactive metal will displace a less reactive one from its compound.
Common Displacement Reactions
Other examples include magnesium displacing zinc from zinc sulphate, and zinc displacing copper from copper sulphate. Always check the positions in the reactivity series first.
Which metal displaces copper from copper(II) sulfate?
Silver
Gold
Zinc
Platinum
What happens when magnesium reacts with hydrochloric acid?
Oxygen gas is produced
Hydrogen gas is produced
No reaction occurs
Chlorine gas is produced
Which element can displace iron from iron(III) oxide?
Lead
Copper
gold
Aluminium
What is produced when sodium displaces potassium?
Sodium hydroxide
No reaction occurs
Potassium hydroxide
Sodium chloride
Which metal cannot displace hydrogen from acids?
Zinc
Iron
Gold
Magnesium
Quick Quiz
If aluminium is put into a solution of iron(II) sulphate, what will happen? (Hint: Check the reactivity series.)
If aluminium is put into a solution of iron(II) sulphate, what will happen? (Hint: Check the reactivity series.)
Review and Reflect
Write one thing you learnt about displacement reactions and one question you still have.
How confident do you feel about displacement reactions?
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
