Classification of Matter Flashcardziz

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What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically combined. Examples include salad, air, and sand.

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What is a pure substance?

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A pure substance is a material that has a constant composition and properties throughout. It can be an element or a compound.

Front

Define an element.

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen, oxygen, and gold.

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What is a compound?

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A compound is a pure substance formed when two or more elements are chemically combined in a fixed ratio. Examples include water (H2O) and carbon dioxide (CO2).

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What distinguishes a mixture from a compound?

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In a mixture, the components retain their individual properties and can be separated physically, while in a compound, the elements lose their individual properties and cannot be separated by physical means.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition 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 that does not have a uniform composition and the individual components can be seen. Examples include salad and oil and water.

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What is a solution?

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A solution is a type of 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 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. In saltwater, salt is the solute and water is the solvent.

Front

What is the law of definite proportions?

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The law of definite proportions states that a chemical compound always contains its component elements in fixed ratio by mass.