Mixtures & Solutions (TEK 5.5B/C)

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What is a mixture?

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A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

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What is a solution?

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A solution is a special type of mixture where one substance (the solute) is completely dissolved in another substance (the solvent).

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What does 'soluble' mean?

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Soluble means that a substance can dissolve in a solvent, such as salt dissolving in water.

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What does 'insoluble' mean?

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Insoluble means that a substance cannot dissolve in a solvent, such as sand in water.

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What is density?

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Density is the mass of a substance divided by its volume, often used to determine if an object will float or sink in a liquid.

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How can you separate a mixture of iron filings and sand?

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You can use a magnet to attract the iron filings, leaving the sand behind.

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What is solubility?

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Solubility is the ability of a substance to dissolve in a solvent at a given temperature and pressure.

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What happens when you mix oil and water?

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Oil and water do not mix because they have different densities and are immiscible, meaning they form separate layers.

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What is an example of a soluble substance?

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An example of a soluble substance is sugar, which dissolves in water.

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What is an example of an insoluble substance?

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An example of an insoluble substance is gravel, which does not dissolve in water.