Chemical Reactions

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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 element in a compound. For example, Zn + H2S → ZnS + H2.

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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. For example, NH3 + HCl → NH4Cl.

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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. For example, 2H2O → 2H2 + O2.

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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. For example, AgNO3 + NaCl → AgCl + NaNO3.

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What is combustion?

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Combustion is a chemical reaction that occurs in the presence of oxygen and produces carbon dioxide and water. For example, CH4 + 2O2 → CO2 + 2H2O.

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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 for each element is the same on both sides of the equation.

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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 a catalyst in a chemical reaction?

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A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.

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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, to the surroundings. For example, combustion reactions are typically exothermic.

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What is an endothermic reaction?

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An endothermic reaction is a chemical reaction that absorbs energy from the surroundings, usually in the form of heat. For example, photosynthesis is an endothermic process.