Types of Chemical Reactions (23-24)

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What is a Synthesis Reaction?

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A synthesis reaction is a type of chemical reaction where two or more reactants combine to form a single product. Example: 2H₂ + O₂ → 2H₂O.

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What is a Decomposition Reaction?

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A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products. Example: 2H₂O → 2H₂ + O₂.

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What is a Single Displacement Reaction?

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A single displacement reaction is a type of chemical reaction where one element replaces another in a compound. Example: Zn + CuSO₄ → ZnSO₄ + Cu.

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What is a Double Displacement Reaction?

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A double displacement reaction is a type of chemical reaction where the cations and anions of two different compounds switch places, forming two new compounds. Example: AgNO₃ + NaCl → AgCl + NaNO₃.

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What is a Product in a Chemical Reaction?

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A product is a substance that is formed as a result of a chemical reaction. Example: In the reaction 2H₂ + O₂ → 2H₂O, H₂O is the product.

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What is a Reactant in a Chemical Reaction?

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A reactant is a substance that undergoes a chemical change in a reaction. Example: In the reaction 2H₂ + O₂ → 2H₂O, H₂ and O₂ are the reactants.

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What is the Law of Conservation of Mass?

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The law 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 is an example of a Combustion Reaction?

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A combustion reaction is a type of reaction where a substance combines with oxygen, releasing energy in the form of light or heat. Example: CH₄ + 2O₂ → CO₂ + 2H₂O.

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What is the difference between a Chemical Change and a Physical Change?

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A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of a substance.

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What is a Balanced Chemical Equation?

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A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.