Acids & Carbonates D. Crowley, 2008

Acids & Carbonates To know how carbonates react with acids and to be able to test for carbon dioxide To know how carbonates react with acids and to be able to test for carbon dioxide Thursday, March 03, 2016

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 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? The same gases were tested by being bubbled through limewater – which gas is which? Test for gasGas ABC Gas bubbled through limewater No reaction Became cloudy Lighted splint put into gas Squeaky popFlame flared upFlame went out A = hydrogen; B = oxygen; C = carbon dioxide

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

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

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

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

Limestone Complete the limestone worksheet

Limestone 1.a) calcium carbonate; b) calcium oxide; c) calcium hydroxide 2.Not huge amount of limestone buildings in Southampton as not too many limestone resources locally 3.a) 2 needs water; b) 3 needs carbon dioxide; c) 1 needs heat 4.calcium oxide + water  calcium hydroxide 5.a) wood / animal dung; b) natural gas, coal or oil; c) technological advances 6.Does damages environment, but very nice looking and natural building material

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