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Separation Techniques Grade 10 Chemistry

Separation Techniques Grade 10 Chemistry. Chelstone High School. Munalula.C.M. Separation Techniques -. Deal with the separation of mixtures to enhance purity of substances Are important to because most substances are needed in their pure state. Some Types of Separation Techniques.

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Separation Techniques Grade 10 Chemistry

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  1. Separation TechniquesGrade 10 Chemistry Chelstone High School. Munalula.C.M

  2. Separation Techniques - • Deal with the separation of mixtures to enhance purity of substances • Are important to because most substances are needed in their pure state.

  3. Some Types of Separation Techniques • Filtration • Chromatography • Distillation

  4. Filtration • This is a technique used to separate mixtures of an insoluble solid and a liquid.

  5. Examples of Mixtures You Can Separate Using Filtration • Sand and water • Broken glass and water • Chalk suspensions and water

  6. Chromatography • Is the separation technique used to separate soluble substances using a media and a solvent. • It is mostly applied in identifying mixtures that are coloured or pigments.

  7. Types of Chromatography • Radial chromatography • Ascending chromatography • Descending chromatography

  8. Radial Chromatography • In this type of chromatography, as the pigment separates, the different colours move outwards.

  9. Radial Chromatogram

  10. Ascending Chromatography • The solvent moves upwards on the separating media \

  11. Descending Chromatography • The solvent moves downwards on the separating media.

  12. Distillation • This is the separation technique where two miscible liquids are separated. • It is made possible due to the fact that each liquid has its unique boiling point.

  13. Types of Distillation • Simple distillation • Fractional distillation

  14. Simple Distillation • This is a technique used to separate a mixture of a soluble substance and a solvent. • E.g salt and water

  15. Fractional distillation • This is the technique used to separate a mixture of two miscible liquids with different boiling points. • E.g water and ethanol • The boiling point for water is 100 while for ethanol it is 78.

  16. Fractional Distillation Demonstration

  17. Questions • What is a mixture? • Give three ways of separating a mixture. • What kind of mixtures can you separate using the filtration method? • Give an example of a mixture you can separate using the fractional distillation method.

  18. Answers • It is a substance made up of two or more substances which are physically combined. • Filtration, Chromatography and Distillation. • Mixtures of an insoluble substance and a liquid. • Ethanol and water.

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