Types of Chemical Reactions

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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 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. Example: In the reaction 2Mg + O₂ → 2MgO, Mg and O₂ are the reactants.

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What is a combustion reaction?

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A combustion reaction is a chemical reaction that occurs when a substance reacts with oxygen, producing energy in the form of heat and light. Example: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.

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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 replacement reaction?

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A single replacement 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 replacement reaction?

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A double replacement reaction is a type of chemical reaction where two compounds exchange ions to form two new compounds. Example: AgNO₃ + NaCl → AgCl + NaNO₃.

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What is a catalyst?

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A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. Example: Enzymes in biological reactions.

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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 exothermic reaction?

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An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat. Example: Combustion of fuels.

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What is an endothermic reaction?

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An endothermic reaction is a chemical reaction that absorbs energy from its surroundings. Example: Photosynthesis.