Bell Work - December 4, 2024

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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 chemical identity, such as color, mass, or volume.

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What is a Chemical Sign?

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An indication that a chemical change has occurred, such as the production of gas, change in color, or change in temperature.

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What does it mean if a substance is flammable?

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It means that the substance can easily catch fire and burn when exposed to a flame or heat.

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What is pH?

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A scale used to measure how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

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What happens when you mix an acid and a base?

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They undergo a chemical reaction called neutralization, producing water and a salt.

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What is an example of a Chemical Change?

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Rust forming on iron when it reacts with oxygen in the presence of moisture.

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What is an example of a Physical Change?

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Melting ice into water, where the substance remains H2O but changes state.

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What is the significance of observing bubbles in a chemical reaction?

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It often indicates that a gas is being produced, which is a sign of a chemical change.

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What is the difference between a reactant and a product?

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Reactants are substances that undergo a chemical change, while products are the substances formed as a result of that change.