Acids & Carbonates

1. Acids & Carbonates D. Crowley, 2008

2. Acids & Carbonates • To know how carbonates react with acids and to be able to test for carbon dioxide

3. Which Gas • The table shows what happened to a lighted splint when it was put into each of the three gases, A, B and C • The same gases were tested by being bubbled through limewater – which gas is which? A = hydrogen; B = oxygen; C = carbon dioxide

4. Carbonates • What gas is produced when carbonates react with acid? • How could you test for this gas? • How could you measure the amount of gas produced (think about how you can be as precise as possible (smallest scale))

5. Carbonates • Add a small amount of carbonate to a small amount of acid, and using a lit splint test for the gas released • Remember: - • Squeaky pop = hydrogen • Relight of splint = oxygen • Splint goes out = carbon dioxide • The gas could be collected and measured using a gas syringe

6. Limewater • Now set up your equipment to test for carbon dioxide using limewater – if it goes cloudy, carbon dioxide has been released

7. Metal Carbonate • When a metal carbonate reacts with acid, it fizzes and seems to disappear • The carbonate and the acid have reacted, producing a salt, water and carbon dioxide Metal carbonate Acid Salt Water Carbon dioxide

8. Limestone Complete the limestone worksheet

9. Limestone • a) calcium carbonate; b) calcium oxide; c) calcium hydroxide • Not huge amount of limestone buildings in Southampton as not too many limestone resources locally • a) 2 needs water; b) 3 needs carbon dioxide; c) 1 needs heat • calcium oxide + water  calcium hydroxide • a) wood / animal dung; b) natural gas, coal or oil; c) technological advances • Does damages environment, but very nice looking and natural building material

10. Anagrams