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,