types of reactions

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What is a Double Replacement Reaction?

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A chemical reaction where two compounds exchange ions or bonds to form two new compounds. Example: PbCl2 + AgNO3 → Pb(NO3)2 + AgCl.

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What is a Decomposition Reaction?

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A type of reaction where a single compound breaks down into two or more simpler products. Example: Pb(NO3)2 → PbO + NO2 + O2.

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What is a Synthesis Reaction?

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A reaction where two or more reactants combine to form a single product. Example: NH3 + HCl → NH4Cl.

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What is a Reactant?

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A substance that undergoes a chemical change in a reaction. Example: In the reaction 4 Fe + 3 O2 → 2 Fe2O3, Fe and O2 are reactants.

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What is a Product?

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A substance that is formed as a result of a chemical reaction. Example: In the reaction 4 Fe + 3 O2 → 2 Fe2O3, Fe2O3 is the product.

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What is a Single Replacement Reaction?

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A reaction where one element replaces another in a compound. Example: Zn + CuSO4 → ZnSO4 + Cu.

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What is a Combustion Reaction?

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A reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat. Example: CH4 + 2 O2 → CO2 + 2 H2O.

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What is the Law of Conservation of Mass?

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In a chemical reaction, mass is neither created nor destroyed; it is conserved. The total mass of reactants equals the total mass of products.

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What is a Balanced Chemical Equation?

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An equation that has the same number of atoms of each element on both sides, indicating that mass is conserved.

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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.