Classification of matter
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Classification of Matter. Matter. Mixture. Pure Substance. Homogeneous (solution). Heterogeneous (mechanical mixture). Element. Compound. Classification of Matter (Alternate). Matter. Homogeneous. Heterogeneous. Mixture. Pure Substance. Element. Compound. Physical properties.

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Classification of Matter

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Classification of matter

Classification of Matter

Matter

Mixture

Pure Substance

Homogeneous (solution)

Heterogeneous (mechanical mixture)

Element

Compound


Classification of matter alternate

Classification of Matter (Alternate)

Matter

Homogeneous

Heterogeneous

Mixture

Pure Substance

Element

Compound


Physical properties

Physical properties

  • A physical property is any aspect of matter that can be measured or seen without changing the composition of the matter.

  • Qualitative

    • Odor, color, texture, state, malleability

  • Quantitative

    • Melting point, boiling point, density, mass


Physical change

Physical Change

  • Does not change the composition of the matter - doesn't change what the substance is

  • In a mixture, individual components retain properties of the original mixture; e.g. dissolving salt in water

    • Change of state (melting, freezing, etc.) is an example of a physical change


Physical separation

Physical Separation

  • Separating a mixture based on physical properties

  • Involves a physical change only (not chemical)

  • Individual components have properties of the mixture

  • Examples:

    • Filtration

    • Using magnetic properties

    • Sedimentation, using density differences


Chemical properties

Chemical Properties

  • A chemical property is any property of matter that becomes evident during a chemical reaction.

  • Can only be measured by changing a substance's chemical identity.

  • Chemical properties cannot be determined just by viewing or touching the matter.


Chemical change

Chemical Change

  • A new substance is formed and energy is either given off or absorbed

  • Involves energy

    • If heat is given off during the reaction, than the reaction is considered to be exothermic.

    • If heat is required for the reaction, than the reaction is considered to be endothermic.

  • Composition of the substance is altered

  • New substances are produced with properties different from the original substance

  • Not easily reversed


Evidence of chemical change

Evidence of Chemical Change

  • The following may indicate that a chemical change has occurred

    • Colour Change

    • Temperature Change

    • Odour Given Off

    • Precipitate is Formed

    • Gas Produced

    • Any new substance produced

  • Examples

    • Burning

    • Metal in acid

    • Electrolysis of water


Chemical separation

Chemical Separation

  • Separating a substance using a chemical change

  • Can be used to separate compounds


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