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Separation of mixtures PowerPoint PPT Presentation


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what is homegeneous ?. What is solute ?. Separation of mixtures. Uniformly mixed – only see one layer. substance that dissolve in a solvent. What is solution ?. Mixture of the solute and the solvent. What is solvent?. Is a substance that dissolves the solute.

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Separation of mixtures

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Separation of mixtures

what is homegeneous?

What is solute ?

Separation of mixtures

Uniformly mixed – only see one layer

substance that dissolve in a solvent

What is solution ?

Mixture of the solute and the solvent

What is solvent?

Is a substance that dissolves the solute

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Separation of mixtures

Method of separation

Physical method used to separated different mixtures

Example: air ,water . Crude oil

Example of physical methods: magnetic attraction , flirtation and evaporation

Separation of mixtures part2

What is No separation of solute and solvent?

What is No residue after flirtation?

Always maintain a uniform appearance

Cannot be separated by filter

Properties of suspension

  • Non homogenous

  • Resident present after flirtation

  • Separation of solute and solvent when left to stand

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Separation of mixtures

Paper chromatography

Separation of mixture part 3

Crystallisation

Use to separate small amounts of mixtures.

Make sure of the fact that difference substances dissolve to different extend mixtures.

Used to separate mixtures of colour substance such as ink and dyes.

Also used to identity the content of mixture or to test the purity of a liquid

Used to separate a soluble solid from a solid liquid mixture.

The solid is first dissolved in solvent to produce a solution .

The solution is then heated to evaporate most of the solvent .

The solution now is said to saturated.

On cooling , the dissolve solids appear as crystals .

The impurities remain in the solution.

The crystals can be dried


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