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Unit 4.3 Separating Soluble Substances

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11.Define the term chromatography.Chromatography is the process of separating a mixture by making it move over or through another.
22.What is evaporation?The addition of heat causing a liquid
to change its state into a gas.
33. What is crystallization?A formation of crystals as a dissolved substance solidifies.
44. What is distillation?Evaporation and condensation that separates solids from liquids, or liquids from liquids letting both materials recover.
55. How can evaporation be used in restaurants?When a chef makes a sauce, the water in the sauce evaporates making the
sauce thicker.
66. What is the difference between smaller and larger crystals?Smaller crystals form when the solvent evaporates quickly, and larger crystals form when the solvent evaporates slowly.
77. How can evaporation and crystallization be used in an industry?Evaporation and crystallization can be used in an industry for removing soluble substances from solutions to purify them.
88. How re crystals formed?The solute left behind by evaporation forms crystals.
99. How do salt producers make salt?They use the heat of the sun to evaporate water from pools of salt water which leave behind crystals to be collected.
1010. What is an impurity?A solution may have unwanted substances dissolved in it known as impurities.