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Léna & Lucy

Mixtures & Compounds. Léna & Lucy. Mixtures. A mixture is two or more substances that have been combined without any chemical reaction . The substances can easily be separated by boiling or dissolving . Even though they are mixed , the substances remain with its indentity.

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Léna & Lucy

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  1. Mixtures & Compounds Léna & Lucy

  2. Mixtures • A mixtureistwoormoresubstancesthathavebeencombinedwithoutanychemicalreaction. The substancescaneasilybeseparatedbyboilingordissolving. Even thoughtheyaremixed, thesubstancesremainwithitsindentity.

  3. DifferencebetweenMixturesandCompounds • A compoundcontainstwoormoreatomsthatarechemicallycombined. • Mixturescontainstwoormoreatomsthatare not chemicallycombined.

  4. Howcanwe Separate a Mixtureintoits Pure Substances? • Forexample, whenyouwantto separate saltfromsand, youneedto: -Add waterandheatuntilthesaltdissolve -Remove thesandfromthesaltywater -Boilthewateruntilitevaporates -At the bottom of the pan, salt will remane.

  5. Examples to describe different methods of separation of mixtures • Salt & Water-condensation • Sugar & Water-crystallization • Ethanol & Water –Distillation • Iron & Sulphur- Magnet

  6. Interesting Facts  1. Sulphur is used to make sulphuric acid. 2. Molten Sulphur is sprayed into a furnace and burned in a blast of hot air. 3. Magnesium is used in fireworks and flares 4. An alloy is a mixture of metals. 5. The gases can be collected separately. This is called fractional distillation.

  7. Sources • Askabout.com • Doctorbrown.com • Ask.com • Wikipedia.com Thanks 4 Watching!!! Lena & Lucy

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