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Science Prep • Book 2 Name: …………………………………………… Experiments: Worksheet 27 Chapter 13: Demonstrating distillation In this experiment you will learn how to collect a solvent from a solution using a method called distillation. Apparatus 1. 2. 3. 4. 5. 6. 7. 8. Safety Take care when using the Bunsen burner – it may burn you. Instructions We have already looked at how to get the pure common salt from a common salt solution but sometimes we need to collect the solvent, e.g. in obtaining pure water from sea water. Evaporation followed by condensation is called distillation. Distillation: this is collecting a solvent from a solution. © Galore Park Publishing Ltd. May be photocopied for classroom use only. Warning: These instructions must be followed carefully, and appropriate equipment and materials must be used, otherwise injury or damage may result, for which no responsibility is accepted by the authors or publishers. Science Prep • Book 2 Name: …………………………………………… Your teacher will demonstrate this experiment using the apparatus (a Liebig condenser) shown below: Thermometer Cold water out Liebig condenser Solution Anti-bumping granules Cold water in HEAT Distillate Questions 1. From the experiment you observe, write down the temperature shown on the thermometer. °C 2. Why is the cold water put in at the bottom of the condenser? . 3. Explain why this method separates the pure water from the salt solution. © Galore Park Publishing Ltd. May be photocopied for classroom use only. Warning: These instructions must be followed carefully, and appropriate equipment and materials must be used, otherwise injury or damage may result, for which no responsibility is accepted by the authors or publishers. Science Prep • Book 2 Experiments: Teacher worksheet 27 Chapter 13: Demonstrating distillation In this experiment the pupils will learn how to collect a solvent from a solution using the distillation process. Apparatus 1. Conical flask 2. Liebig condenser 3. Thermometer 4. Anti-bumping granules 5. Bunsen burner 6. Round bottomed flask and rubber bung 7. Retort stands, boss and clamps 8. Rubber tubing Hazards • Risk of burning – Bunsen burner. Risk assessment and safety • Ensure correct precautions are taken when using Bunsen burners. Advance preparation No advance preparation is required in order to carry out this experiment. © Galore Park Publishing Ltd. May be photocopied for classroom use only. Warning: These instructions must be followed carefully, and appropriate equipment and materials must be used, otherwise injury or damage may result, for which no responsibility is accepted by the authors or publishers..

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