PS - Chapter 2 Test Review

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What is a Chemical Property?

Back

A characteristic of a substance that can only be observed during a chemical reaction, indicating how a substance interacts with other substances.

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What is a Physical Property?

Back

A characteristic of a substance that can be observed or measured without changing the substance's identity, such as color, boiling point, or density.

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What is a Physical Change?

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A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting or freezing.

Front

What is a Chemical Change?

Back

A change that results in the formation of new chemical substances, indicating a chemical reaction has occurred, such as rusting or burning.

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What distinguishes a Pure Substance from a Mixture?

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A pure substance has a fixed composition and distinct properties, while a mixture contains two or more substances that retain their individual properties.

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What is a Homogeneous Mixture?

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A mixture that has a uniform composition throughout, such as saltwater or air.

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What is a Heterogeneous Mixture?

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A mixture that consists of visibly different substances or phases, such as salad or sand and iron filings.

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What is Reactivity in terms of Chemical Properties?

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Reactivity refers to how readily a substance undergoes a chemical reaction with other substances.

Front

What is Boiling Point?

Back

The temperature at which a liquid turns into vapor, a physical property of the substance.

Front

What is Melting Point?

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The temperature at which a solid becomes a liquid, a physical property of the substance.