Keywords: calcium carbonate, thermal decomposition, slaked lime, limewater
C1 Topic 2: Materials from the Earth
Making Limewater
This topic looks at:
•
Formation of Rocks
•
Limestone and it’s uses
•
Chemical Reactions
What is slaked lime and how is it
obtained from Limewater? (Describe
using word equations. Ext use symbol
equations)
What are the three uses of Limestone
1.
2.
3.
1.
2.
Can you balance
Advantages
Na (s) + H2O(l)  NaOH(aq) +H2(g)
Disadvantages
Add CO2
Describe three things you must do
when balancing equations
3.
A company wants to build a limestone quarry next to a small town. State
the advantages and disadvantages of this.
Step 4
Balancing Equations
Describe/draw how each of these
rock types is formed give examples of
each:
Chemical name
Calcium Carbonate
Common name
Limestone
formula
CaCO3
Sedimentary
Step 1
CH4(g) +
O2(g) 
Cu(s) +
O2(g) 
CuO(s) +
C(s) 
H2O(l)
+ CO2(g)
CuO(s)
Cu(s)
CO2(g)
Neutralising Acids with Limestone
How can farmers neutralise soil that is
too acidic for crops to grow on it?
CO2
released
Igneous
Ca(OH)2 (aq)
Limestone Quarry
Step 3
What are some uses for a limestone
quarry after it has closed down?
Step 2
Metamorphic
Calcium Hydroxide CaO
a little water Calcium Oxide
Limewater
Quicklime
Thermal Decomposition
Ca(OH)2 Add
Add water
Keywords: crystals, fossils, erosion, magma, lava, atoms,