PHYSICAL AND CHEMICAL PROPERTIES



PHYSICAL AND CHEMICAL PROPERTIES

Read p.148-153

A Physical Property describes a ______________________________________________________________

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|Property |Description |Examples |

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|Lustre & Colour | | |

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|Viscosity | | |

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|Hardness | | |

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|Malleability | | |

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|Ductility | | |

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|Electrical Conductivity | | |

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|Density | | |

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A Chemical Property describes ______________________________________________________________

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|Chemical Properties |Examples of Chemical Properties (check pg.152) |

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|Ability to burn (combustion) | |

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|Behaviour in air (react or tarnish) | |

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|Reaction with water (corrode) | |

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|Reactivity with another pure substance | |

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|Reaction to heating (decompose) | |

PHYSICAL AND CHEMICAL PROPERTIES

A physical property is observed with the senses and can be determined without destroying the object. For example, colour, shape, mass, length and odour are all examples of physical properties.

A chemical property indicates how a substance reacts with something else. The original substance is fundamentally changed in observing a chemical property. For example, iron rusting is a chemical property. The iron has reacted with oxygen and the original iron metal has changed. It now exists as iron oxide, a different substance.

Classify the following properties as either chemical (C) or physical (P);

1. Colour blue _____ 9. Hardness _____

2. Density _____ 10.Boiling point _____

3. Flammability _____ 11.Lustre _____

4. Solubility _____ 12.Odour _____

5. Supports combustion _____ 13.Reacts with water to _____

form a gas

6. Sour taste _____

14.Reacts with a base to _____

7. Melting point _____ form water

8. Reacts with acid to _____ 15.Vinegar will react with _____

form H2 baking soda

Water and gasoline are both clear liquids at room temperature. Describe one physical property and one chemical property that might be used to distinguish between them.

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Carbonation in soft drinks is due to carbon dioxide. Is the process of carbon dioxide gas leaving a drink as it goes flat a chemical property? Explain.

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What is the difference between a qualitative and a quantitative property? Use examples of each type of property in your answer.

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Extend the Concept:

Investigate the diagram to the right. What does it mean? What is it referring to?

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