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