2 Learning ObjectiveList and describe several techniques used to separate mixtures.
3 Separating MixturesBecause mixtures are PHYSICAL combinations of substances, the components can be separated by PHYSICAL means.Methods of separation take advantage of differences in physical properties of the mixed substances.
4 How would you separate this mixture? Iron FilingsSulfur
5 MagnetismIf one of the components of a mixture has magnetic properties, a magnet can be used to separate the mixture.Iron, nickel, cobaltNot all metals are magnetic.Gold, silver, and aluminum are not magnetic
6 FiltrationHeterogeneous mixtures composed of solids and liquids are easily separated by filtration.Filtration is a technique that uses a porous barrier to separate a solid from a liquid.
7 DecantingDecanting is a process of separating mixtures which allows a mixture of solids and liquids or two immiscible liquids to settle and separate by gravity.Once the mixture components have separated, the lighter liquid is poured off leaving the heavier liquid or solid behind.
8 Sifting or SievingSifting is a method of separation used to separate a dry mixture that contains substances of different sizes by passing it through a sieve, a device containing tiny holes.
9 DistillationMost homogeneous mixtures can be separated by distillation.Distillation is a separation technique that is based on differences in the boiling points of the substances involved.
10 DistillationIn distillation, a mixture is heated until the substance with the lowest boiling point boils to a vapor that can then be condensed into a liquid and collected.
11 CrystallizationCrystallization is a separation technique that results in the formation of pure solid particles of a substance from a solution containing the dissolved substance.Rock candy
12 ChromatographyChromatography is a technique that separates the components of a mixture (called the mobile phase) based on the ability of each component to travel or be drawn across the surface of another material (called the stationary phase).
13 ChromatographyUsually the mobile phase is a gas or a liquid, and the stationary phase is a solid, such as chromatography paper.The separation occurs because the various components of the mixture spread through the paper at different rates.
14 Separating Mixtures Foldable MethodMagnetismFiltrationDecantingSiftingDistillationCrystallizationChromatographyOn the outside of tabs of the foldable, write the name of each method of separation as shown
15 Separating Mixtures Foldable HowWhatMixtures with magnetic substancesMagnetOn outside tabs, describe how substances are separated by that particular methodOn inside tabs record what types of mixtures are separated using this method
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