Notes on Compounds and mixturesNotes on Compounds and mixtures

Compounds Compounds Examples: Water HExamples: Water H22OO Sugar CSugar C66HH1212OO66 Salt NaClSalt NaCl Carbon Dioxide COCarbon Dioxide CO22 Characteristics: The properties of Characteristics: The properties of

compounds are very different from the compounds are very different from the properties of the elements that combine properties of the elements that combine to form them. It requires a chemical to form them. It requires a chemical change to separated the elements.change to separated the elements.

Mixtures:Mixtures:

Examples: air, muddy water, Examples: air, muddy water, sugar water, sandsugar water, sand

Characteristics: Its components Characteristics: Its components can be separated by physical can be separated by physical means. It is made up of two or means. It is made up of two or more compounds. Its more compounds. Its components keep their own components keep their own properties.properties.

Compound or Mixture?Compound or Mixture? WaterWater AirAir Muddy waterMuddy water IceIce Sugar waterSugar water SandSand Sugar saltSugar salt Salt waterSalt water Carbon dioxide continue on next Carbon dioxide continue on next

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Compound or Mixture?Compound or Mixture? Its components can be separated by Its components can be separated by

physical meansphysical means It has properties that differ from those of its It has properties that differ from those of its

separate elementsseparate elements It can be formed by atoms sharing electronsIt can be formed by atoms sharing electrons It can be formed by negative and positive It can be formed by negative and positive

ions joiningions joining It is made up of two or more compoundsIt is made up of two or more compounds Its components keep their own propertiesIts components keep their own properties It requires a chemical change to be It requires a chemical change to be

separated.separated.

Types of MixturesTypes of Mixtures Solution – a mixture of two or more Solution – a mixture of two or more

substances that is homogeneous at substances that is homogeneous at the molecular level; a solution consists the molecular level; a solution consists of a solute and a solvent.of a solute and a solvent.

Homogeneous – a mixture in which Homogeneous – a mixture in which every sample of it has the same every sample of it has the same compositioncomposition

Heterogeneous – a mixture in which Heterogeneous – a mixture in which every sample of it might have a every sample of it might have a different composition. different composition.