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Chemical and Physical

Chemical and Physical. Properties and Changes. Chemical and Physical PROPERTIES. Physical Properties are properties that can be determined without changing its composition (colour, odour, melting point, etc.).

kenyon-mccarty
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Chemical and Physical

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  1. Chemical and Physical Properties and Changes

  2. Chemical and Physical PROPERTIES • Physical Propertiesare properties that can be determined without changing its composition (colour, odour, melting point, etc.). • Chemical Propertiesare properties observed only when the substance undergoes a change in composition (combustion, rusting, reactivity with acid, etc.).

  3. Chemical and Physical PROPERTIES Physical Properties: • Properties may include: appearance, texture, odour, taste, state, density, hardness, fusibility, melting/boiling point, boiling/condensation point, solubility, conductivity, temperature, viscosity, shape, size, lustre, malleability, optical clarity Chemical Properties: • Reactivity, combustibility, specific reactions with certain elements or compounds, resistance to change (cleaning solutions, paint stripper, etc.)

  4. Chemical and Physical CHANGES Physical Change • The composition of the substance remains the same and no new substances are made. (Object melts, boils, conducts electricity, etc) Chemical Change • Always accompanied by a change in the starting substance and the production of one or more new substances. (A gas or precipitate is formed, colour changes, a new smell is produced, etc.)

  5. Complete the chart

  6. Text Work • Use your textbook to write definitions of the properties we have listed here. (See page 180) • Pg. 182 #1 - 5 • Pg. 186 #1 - 7

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