CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
Name ___________________________________ Date _____________
Worksheet 5.1
Is there a reaction?
Use the table of results below to help you work out the answers to the questions.
silver
nitrate
copper
sulfate
magnesium
sulfate
iron
sulfate
zinc
sulfate
silver
x
no reaction
no reaction
no reaction
no reaction
copper
reaction
x
no reaction
no reaction
no reaction
magnesium
reaction
reaction
x
reaction
reaction
iron
reaction
reaction
no reaction
x
no reaction
zinc
reaction
reaction
no reaction
reaction
x
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
1
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
1
Aluminium is more reactive than zinc and less reactive than magnesium. Would aluminium
react with:
a
copper sulfate? _______________
b magnesium sulfate? _______________
2
Tin is more reactive than copper and less reactive than iron. Would tin react with:
a
silver nitrate? _______________
b zinc sulfate? _______________
3
Lead is more reactive than copper and less reactive than tin. Would lead react with:
a
copper sulfate? _______________
b iron sulfate? _______________
4
Sodium is a very reactive metal.
Would a reaction take place between magnesium and sodium chloride? _______________
5
Write the word equation for the reaction between zinc and copper sulfate.
__________________________________________________________________________________
6
Explain why there would be no reaction between potassium chloride and zinc.
__________________________________________________________________________________
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
2
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
Support sheet
1
Think about what would happen if you reacted zinc with copper sulfate and magnesium
sulfate and remember that aluminium is more reactive than zinc.
Think about what would happen if you reacted magnesium with copper sulfate and magnesium sulfate
and remember that aluminium is less reactive than magnesium.
2
Think about what would happen if you reacted copper with silver nitrate and zinc sulfate
and remember that tin is more reactive than copper.
Think about what would happen if you reacted iron with silver nitrate and zinc sulfate and remember
that tin is less reactive than iron.
3
Think about what would happen if you reacted copper with copper sulfate and iron sulfate
and remember that lead is more reactive than copper.
Think about what would happen if you reacted tin (look at your answer to question 2) with silver
nitrate and zinc sulfate and remember that tin is less reactive than lead.
4
Think: Is sodium more or less reactive than magnesium?
6
Think: Is potassium or zinc the more reactive metal?
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
3
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
Name ___________________________________ Date _____________
Extension sheet
7
For questions 1–3, write the word equations for any reaction that takes place.
Additional questions:
8
Calcium is more reactive than magnesium and less reactive than sodium.
Which of the following reactions would take place:
a
calcium and sodium chloride
b calcium and potassium chloride
c
calcium and magnesium chloride?
_______________________________________________________________________________
9
Write the word equation for any of the above reactions that would take place.
10 a
Could potassium displace the sodium in sodium chloride?
_______________________________________________________________________________
b
What safety issues would there be with carrying out this reaction in school?
_______________________________________________________________________________
_______________________________________________________________________________
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
4
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
Name ___________________________________ Date _____________
Worksheet 5.4A
Salts, alkalis, formulae and equations
1
Name a salt formed from the following:
a
hydrochloric acid: _______________
b citric acid: _______________
c
zinc and nitric acid: _______________ nitrate
d copper and sulfuric acid: _______________ sulfate
2
These formulae are incorrect. Write them correctly in the second row.
HSO 4
HCl 2
HNO 3
3
Give an example of a base: _______________
4
Give an example of an alkali: _______________
5
Explain the difference between an alkali and a base.
(What do you need to do to a base to produce an alkali?)
__________________________________________________________________________________
__________________________________________________________________________________
6
Write a word equation for the reaction between sulfuric acid and the alkali that contains sodium.
_______________
sodium _______________ + sulfuric acid → _______________ + _______________
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
5
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
7
Write a word equation for the reaction to prepare the salt copper chloride from copper carbonate.
copper _______________ +
8
hydrochloric
copper
→
+ _______________ + _______________
acid
chloride
Write the symbol equation for the reaction between the alkali that contains sodium and
hydrochloric acid.
Na_______ + HCl → _______________ + H2O
9
Write the symbol equation for the reaction between magnesium and sulfuric acid.
Mg + _______________ → MgSO4 + H2
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
6
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
Name ___________________________________ Date _____________
Worksheet 5.4B
Salts, alkalis, formulae and equations
1
Name a salt formed from the following:
a
hydrochloric acid: _______________
b citric acid: _______________
c
zinc and nitric acid: _______________
d copper and sulfuric acid: _______________
2
These formulae are incorrect write them correctly in the row below.
HSO 4
HCl 2
3
Give an example of a base: _______________
4
Give an example of an alkali: _______________
5
Explain the difference between an alkali and a base.
(What do you need to do to a base to produce an alkali?)
HNO 3
__________________________________________________________________________________
__________________________________________________________________________________
6
Write a word equation for the reaction between sulfuric acid and the alkali that contains sodium.
sodium _______________ + sulfuric acid → ______________________ + _______________
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
7
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
7
Write a word equation for the reaction to prepare the salt copper chloride from copper carbonate.
copper ____________ + ____________ acid → copper chloride + ____________ + ____________
8
Write the symbol equation for the reaction between the alkali that contains sodium and
hydrochloric acid.
_______________ + HCl → _______________ + H2O
9
Write the symbol equation for the reaction between magnesium and sulfuric acid.
Mg + _______________ → MgSO4 + _______________
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
8
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
Name ___________________________________ Date _____________
Worksheet 5.4C
Salts, alkalis, formulae and equations
1
Name a salt formed from the following:
a
hydrochloric acid: _______________
b citric acid: _______________
c
zinc and nitric acid: _______________
d copper and sulfuric acid: _______________
2
These formulae are incorrect write them correctly in the row below.
HSO 4
HCl 2
3
Give an example of a base: _______________
4
Give an example of an alkali: _______________
5
Explain the difference between an alkali and a base.
HNO 3
__________________________________________________________________________________
__________________________________________________________________________________
6
Write a word equation for the reaction between sulfuric acid and the alkali that contains sodium.
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
9
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
7
Write a word equation for the reaction to prepare the salt copper chloride from copper carbonate.
8
Write the symbol equation for the reaction between the alkali that contains sodium and
hydrochloric acid.
9
Write the symbol equation for the reaction between magnesium and sulfuric acid.
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
10
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
Name ___________________________________ Date _____________
Worksheet 5.5
How much more mass?
Some students heated magnesium ribbon in a crucible and measured the increase in mass.
They used different masses of magnesium and measured the mass of magnesium oxide produced.
Here are their results:
Mass of magnesium used
in g
Mass of magnesium oxide
produced in g
1
2
3
4
5
6
7
8
9
10
1.65 3.2 5.0 6.6 7.3 10.0 11.5 13.3 15.0 16.4
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
11
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
1
Plot the results on a graph.
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
12
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
2
Describe the line on the graph.
__________________________________________________________________________________
__________________________________________________________________________________
3
What conclusion can the students draw from their results?
__________________________________________________________________________________
__________________________________________________________________________________
4
Which result does not fit the pattern?
__________________________________________________________________________________
5
What would you do about this result of you were doing this investigation?
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
13
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
Support sheet
1
Use a ruler and pencil to draw in the axes.
On the graph, put the mass of magnesium used along the horizontal x-axis.
Use at least ten small squares to represent 1 g of magnesium. Label the axis.
Put the mass of magnesium oxide produced on the vertical y-axis. Use at least ten small squares for
1 g of magnesium oxide. Label both axes.
Plot the points carefully with a sharp pencil and mark each point with a small cross.
Look at the pattern the points make and join them up in a suitable way.
2
Describe the shape of the line. Does it go up or down? Does it go up steeply? Does the angle of the
line change as more magnesium metal is used?
3
What does the graph tell the learners?
5
Think about what you could do. Could you do the investigation again? Could you compare your
results with those of other learners? How might that help you?
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
14
CAMBRIDGE LOWER SECONDARY SCIENCE 9 UNIT 5: REACTIVITY
Name ___________________________________ Date _____________
Extension sheet
6
Carry out a risk assessment for this activity.
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
7
What are the likely sources of error in this investigation?
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
15