Pure Substances and Mixtures

Front

What is a pure substance?

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A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

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What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties. Mixtures can be homogeneous or heterogeneous.

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What is a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent). An example is sugar dissolved in water.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has the same composition and appearance throughout. Examples include saltwater and air.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the components are not uniform and can be easily distinguished. Examples include salad and chicken noodle soup.

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What does 'kinetic energy' refer to in states of matter?

Back

Kinetic energy refers to the energy of motion of particles. In solids, particles have the least kinetic energy, while in gases, they have the most.

Front

List the states of matter in order from least to greatest kinetic energy.

Back

Solids, liquids, gases.

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What happens to the properties of substances in a mixture?

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In a mixture, each substance retains its own properties and can be separated by physical means.

Front

What is the difference between a solute and a solvent?

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A solute is the substance that is dissolved in a solution, while a solvent is the substance that does the dissolving.

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What is an example of a homogeneous mixture?

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An example of a homogeneous mixture is vinegar, which is a mixture of acetic acid and water.