Types of Reactions and Balancing

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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 simple substances combine to form a more complex product. Example: Na + Br₂ → NaBr.

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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: KClO₃ → KCl + O₂.

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What is a combustion reaction?

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A combustion reaction is a type of chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat. Example: C₅H₁₀ + O₂ → CO₂ + H₂O.

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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 or bonds to form two new compounds. Example: AgNO₃ + NaCl → AgCl + NaNO₃.

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How do you balance a chemical equation?

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To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.

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What is a precipitate in a chemical reaction?

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A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction. Example: In the reaction Pb(NO₃)₂ + 2KI → PbI₂ + 2KNO₃, PbI₂ is the precipitate.

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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 the role of coefficients in a balanced equation?

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Coefficients are used in a balanced equation to indicate the number of molecules or moles of each reactant and product involved in the reaction.

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What is the difference between an endothermic and exothermic reaction?

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An endothermic reaction absorbs energy from its surroundings, while an exothermic reaction releases energy to its surroundings.