Physical and Chemical Review

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What is a chemical change?

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A chemical change is a process where substances react to form new substances with different properties, often accompanied by energy changes, such as heat or light.

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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, such as changes in state (solid, liquid, gas).

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What is combustion?

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Combustion is a chemical reaction that occurs when a substance reacts rapidly with oxygen, producing heat and light, commonly seen in burning.

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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.

Front

What evidence indicates a chemical reaction has occurred?

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Evidence of a chemical reaction includes color change, gas formation, temperature change, and the formation of a precipitate.

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What is gas formation in a chemical reaction?

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Gas formation is the production of gas as a product of a chemical reaction, often observed as bubbles.

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What is an exothermic reaction?

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An exothermic reaction is a chemical reaction that releases energy in the form of heat or light.

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What is the difference between a reactant and a product?

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A reactant is a substance that undergoes a chemical change, while a product is a substance formed as a result of that change.

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What is a solute?

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A solute is a substance that is dissolved in a solution, typically present in a smaller amount compared to the solvent.

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What is a solvent?

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A solvent is a substance that dissolves a solute, forming a solution, and is typically present in a larger amount.