Sep 13: Signs of Chemical Changes

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into new substances with different properties.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What is evidence of a chemical reaction?

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Evidence of a chemical reaction includes the formation of a new substance, gas production, color change, and the production of a precipitate.

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What does it mean when bubbles are produced in a reaction?

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The production of bubbles indicates that a gas is being formed, which is a sign of a chemical change.

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What is a precipitate?

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A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

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What is meant by a change in energy during a chemical reaction?

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A change in energy refers to the absorption or release of energy, often in the form of heat or light, during a chemical reaction.

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What is color change in a chemical reaction?

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Color change is an indication that a chemical reaction has occurred, as new substances with different colors are formed.

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What are reactants?

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Reactants are the starting substances in a chemical reaction that undergo change to form products.

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What are products in a chemical reaction?

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Products are the substances that are formed as a result of a chemical reaction.

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How can you identify a chemical change?

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You can identify a chemical change by observing signs such as gas production, color change, temperature change, or the formation of a precipitate.