Chemical Reactions

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What is a chemical reaction?

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A chemical reaction is the process by which one or more substances change to produce one or more different substances.

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What are the reactants in a chemical equation?

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The reactants are the substances that undergo a chemical change in a reaction, typically found on the left side of a chemical equation.

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What are the products in a chemical equation?

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The products are the substances that are produced as a result of a chemical reaction, typically found on the right side of a chemical equation.

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How can you determine if a chemical equation is balanced?

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A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

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What is the significance of the coefficients in a chemical equation?

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Coefficients indicate the number of molecules or moles of a substance involved in the reaction and are used to balance the equation.

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What effect does increasing the surface area of a reactant have on the rate of reaction?

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Increasing the surface area of a reactant increases the rate of reaction due to more area being available for collisions between reactant particles.

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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 total mass of reactants equals the total mass of products.

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What is an example of a physical change versus a chemical change?

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A physical change involves a change in state or appearance (e.g., melting ice), while a chemical change results in the formation of new substances (e.g., rusting iron).

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What role do catalysts play in chemical reactions?

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Catalysts speed up chemical reactions without being consumed in the process by lowering the activation energy required for the reaction.

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What is activation energy?

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Activation energy is the minimum energy required for a chemical reaction to occur.

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