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1 p9 chemical changes 111110

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1 p9 chemical changes 111110

  1. 1. 1P9: Thursday 11th November, 2010 Matter and Particles: Chemical Changes
  2. 2. Homework • Homework set on Thursday 4th was due on Monday 8th November… – Some were great and MERITS were awarded  – Some were not as great – more effort required please! – Some were not handed in – very disappointing  • If this happens again de-merits will be given out • New Homework: due in on Tuesday 17th November – write this down in your notebooks!!! – Homework 3. Q3 – Homework 4. Q1, 2, 3.
  3. 3. Let’s review our learning: hands up please! • What is a chemical reaction? • Name some everyday chemical reactions • Complete the following word equation: • Magnesium + Oxygen  • What did Magnesium look like before it was burned? • What did it look like after it was burned? • Was this a mixture or a compound? • Can we change the Magnesium back to a shiny metal again?
  4. 4. Write up your last Experiment! – Draw a labelled diagram of the experiment – What apparatus did you use? – Describe how you burned the Magnesium – Note down all your observations: – What did Magnesium look like before it was burned? – What did it look like after?
  5. 5. More experiments! • Today we will be doing 2 more experiments – A: Adding Marble chips into Hydrochloric Acid – B: Mixing two solutions together – You will have about 10 minutes to do each experiment • For both experiments you will need to: – draw a labelled diagram – explain how you did the experiment – carefully observe and note down what happens
  6. 6. Experiment A: marble chips and acid • Add some Hydrochloric acid into a beaker • Take the temperature of the acid using the thermometer – Note this result down • Add in some marble chips – Note down what happens in your notebooks • Measure the temperature again – Note this result down
  7. 7. Experiment B: Mixing solutions • Add 2cm depth of solution A into one test tube – What does this solution look like? Note it down • Add 2cm depth of solution B into another test tube – What does this solution look like? Note it down • Pour the contents of one test tube into another – What does this mixture look like? Note it down – Is there anything else there now that wasn’t before?
  8. 8. Let’s review our results: hands up please! • What happened to the marble chips? • Was there a temperature change? • What did the solutions look like before they were mixed together? • What did the solutions look like after they were mixed?
  9. 9. Conclusions • Looking back at the experiments we have done we can say that: Chemical reactions have the following things in common: – They produce new substances – They involve a change in temperature – They involve a change in appearance
  10. 10. What’s next? • Tuesday 17th November – Hand in your homework for me to check! – We will be revising Matter and Particles topic for a TEST on THURSDAY 18th November • Using your traffic light colours – please let me know if you have understood chemical reactions today!

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