3B-3 & 3D Chemical Reactions and Equations

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What is a chemical reaction?

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A process where substances (reactants) are transformed into new substances (products) through the breaking and forming of chemical bonds.

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What does it mean to increase concentration in a chemical reaction?

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To add more reactant particles to a solution, which can speed up the reaction by increasing the likelihood of collisions between particles.

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What is an endothermic reaction?

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A type of chemical reaction that absorbs heat from its surroundings, resulting in a temperature decrease in the environment.

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What is an exothermic reaction?

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A type of chemical reaction that releases heat to its surroundings, resulting in a temperature increase in the environment.

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What are reactants?

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The starting substances in a chemical reaction that undergo change to form products.

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What are products?

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The substances that are formed as a result of a chemical reaction.

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What is a coefficient in a chemical equation?

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A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

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What is a subscript in a chemical formula?

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A small number written after an element symbol that indicates the number of atoms of that element in a molecule.

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What is surface area in the context of chemical reactions?

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The total area of the surface of a solid reactant that is exposed to a liquid or gas, which can affect the rate of reaction.

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What is a catalyst?

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A substance that increases the rate of a chemical reaction without being consumed in the process.