New topic Chemical Reactions including Metals Fill in your target sheet Stick in your target sheet and glossary.

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Presentation transcript:

New topic Chemical Reactions including Metals Fill in your target sheet Stick in your target sheet and glossary

All change! Learning Objectives To explain what happens to particles in a chemical reaction. (L5) To describe how Scientists use models to predict what happens in chemical reactions. (L6) Construct balanced chemical equations. (L7) Keywords Combustion, model, equation.

Starter What is burning? Light a candle (take care not to burn yourself) Now discuss what is happening ….. ….. Using the words REACTANTS and PRODUCTS.

Combustion Combustion is……. Combustion is the scientific word for burning.

Combustion Colour at the start Colour at the end Anhydrous copper sulfate Limewater Anhydrous copper sulfate can be used to test for ____________ Limewater can be used to test for ________________

The Science behind combustion Fuels are Hydrocarbons. During combustion the carbon and hydrogen atoms in the fuel are oxidised Methane + Oxygen Carbon dioxide + Water CH 4 + 2O 2 CO 2 + H 2 O This process also releases energy (in the form of heat)

Task Write balanced symbol Equations for the reactions below 1.Methane + Oxygen  Carbon Dioxide + Water 2.Ethane + Oxygen  Carbon Dioxide + Water 3.Propane + Oxygen  Carbon Dioxide + Water 4.Butane + Oxygen  Carbon Dioxide + Water CH 4 + 2O 2  CO 2 + 2H 2 O 2C 2 H 6 + 7O 2  4CO 2 + 6H 2 O C 3 H 8 + 5O 2  3CO 2 + 4H 2 O 2C 4 H O 2  8CO H 2 O

Definitions Complete Combustion: yletelpmoc nrub ot leuf eht rof tneserp negyxo hguone Methane + oxygen  carbon dioxide + water Incomplete Combustion: yletelpmoc nrub ot leuf eht rof negyxo hguone ton Methane + oxygen  carbon monoxide + water Combustion is an oxidising reaction.

Combustion Complete combustion Carbon dioxide Water Energy Partial combustion Carbon monoxide Carbon Water AB Q1. which flame is showing complete and Partial combustion? Q2. How would you set up a Bunsen burner to achieve flame B? Q3. A gas fire with a yellow coloured flame is dangerous because......

Carbon Monoxide Watch the video and answer the question: Why is Carbon Monoxide so dangerous? M