The law of mass action expresses a relationship between:
Correct answer: A. Rate of reaction and concentration of reacting substance
- A. Rate of reaction and concentration of reacting substance
- B. Rate of reaction and concentration of products
- C. Concentration of reactants and concentration of products
- D. Concentration of reactants and catalysts
Explanation
Option A is correct because the law of mass action expresses the relationship between the rate of a chemical reaction and the concentrations of the reactants. It states that the rate of a chemical reaction is directly proportional to the product of the molar concentrations (or activities) of the reactants, each raised to the power of its stoichiometric coefficient in the balanced chemical equation.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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