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Differences between pure substances and mixtures

Differences between pure substances and mixtures. Characteristics of Pure Substances. Fixed composition Distinct properties Cannot be separated into simpler substances by physical methods Can only be changed in identity and properties by chemical methods (Unit 4)

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Differences between pure substances and mixtures

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  1. Differencesbetweenpuresubstances and mixtures

  2. Characteristics of Pure Substances • Fixed composition • Distinct properties • Cannot be separated into simpler substances by physical methods • Can only be changed in identity and properties by chemical methods (Unit 4) • Properties do not vary one sample to another sample What does this mean?

  3. Mixtures • Form when elements and/or compounds are combined physically • Properties of a mixture are related to its components • Composition varies from sample to sample • Can be separated by physical methods • Examples of Mixtures: Tea, Perfume, Air, Salad, Beach sand, oil and vinegar salad dressing, etc.

  4. Solutions: water and ……

  5. Differencesbetweenpuresubstances and mixtures

  6. Learning more Whatwouldyou do?

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