Types of Chemical Reactions

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What is a Decomposition Reaction?

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A chemical 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 (Combination) Reaction?

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

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What is a Single Replacement Reaction?

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A chemical reaction where one element replaces another in a compound. Example: 3Pb + 2H3PO4 → 3H2 + Pb3(PO4)2.

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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: KOH + H3PO4 → K3PO4 + H2O.

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What are Reactants in a chemical equation?

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The substances that undergo a chemical change in a reaction, found on the left side of the equation.

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What are Products in a chemical equation?

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The substances that are formed as a result of a chemical reaction, found on the right side of the equation.

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What does the arrow (→) represent in a chemical equation?

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It indicates the direction of the reaction, separating reactants from products.

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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.

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What is a Balanced Chemical Equation?

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An equation where the number of atoms for each element is the same on both sides, ensuring mass conservation.

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What is an example of a Combustion Reaction?

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