Physical and Chemical Changes; Law of Conservation of Mass

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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 a chemical change?

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A chemical change is a change that results in the formation of new chemical substances, involving the breaking and forming of bonds.

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What is the Law of Conservation of Mass?

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The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the mass of the reactants equals the mass of the products.

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What are reactants in a chemical reaction?

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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 balanced chemical equation?

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A balanced chemical equation has the same number of each type of atom on both sides of the equation.

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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 when two solutions are combined.

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What is photosynthesis?

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Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of carbon dioxide and water.

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What is the significance of balancing chemical equations?

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Balancing chemical equations is important to ensure that the Law of Conservation of Mass is upheld in a chemical reaction.

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What happens to atoms during a chemical reaction?

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During a chemical reaction, atoms are rearranged to form new substances, but the total number of atoms remains the same.