Flashcards
Methods of Separating Mixtures: Sieving, Filtration, Distillation
Cards in this deck (10)
- 1Sieving: Sieving is a simple technique for separating particles of different sizes. A sieve such as used for sifting flour has very small holes. Coarse particles are separated or broken up by grinding against one another and the screen openings.
- 2Evaporation: Is the process by which an element or compound transitions from its liquid state to its gaseous state below the temperature at which it boils; in particular, the process by which liquid water enters the atmosphere as water vapour.
- 3Distillation:A method of separating a substance that is in solution from its solvent or of separating a liquid from a mixture of liquids having different boiling points. The liquid to be separated is evaporated (as by boiling), and its vapor is then collected after it condenses. Distillation is used to separate fresh water from a salt solution and gasoline from petroleum. The condensed vapor, which is the purified liquid, is called the distillate.
- 4Decantation: is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
- 5Crystallization or crystallisation: is the (natural or artificial) process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas.
- 6Filtration: is the process in which solid particles in a liquid or gaseous fluid are removed by the use of a filter medium that permits the fluid to pass through but retains the solid particles.
- 7Magnetism: a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
- 8Paper chromatography: is in analytical chemistry, technique for separating dissolved chemical substances by taking advantage of their different rates of migration across sheets of paper. It is an inexpensive but powerful analytical tool that requires very small quantities of material.
- 9Centrifuging: an apparatus that rotates at high speed and by centrifugal force separates substances of different densities, as milk and cream.
- 10A bibliography is a listing of the books, magazines, and Internet sources that you use in designing, carrying out, and understanding your science fair project. But, you develop a bibliography only after first preparing a background research plan — a road map of the research questions you need to answer.
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- Flashcards on Untitled, created by Baca Aguilar Mario Alejandro on 09/07/2020.
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- Baca Aguilar Mario Alejandro
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