CHEM121 GENERAL CHEMISTRY LAB Module 6 Final Assessment Q & A 2026 (Complete And Verified Study material) (17pages) LEARNEXAMS

1. Open-ended: Describe the process of determining the equilibrium constant (Kc) for a reversible chemical reaction. What factors must be considered, and why are they important? Answer: The equilibrium constant (Kc) is determined by measuring the concentrations of reactants and products at equilibrium. Factors to consider include temperature, because Kc is temperature-dependent; the physical state of the reactants and products; and the stoichiometry of the reaction. These factors are important because they influence the position of equilibrium and the value of Kc. 2. Fill-in-the-blank: The reaction quotient (Q) is used to _______ the direction in which a reaction will proceed to reach equilibrium. Answer: predict 3. True/False: A catalyst affects the position of the chemical equilibrium. Answer: False. Rationale: A catalyst speeds up the rate at which equilibrium is reached but does not affect the position of the equilibrium itself. 4. Multiple-choice: Which of the following statements is true regarding Le Chatelier's Principle? A) It predicts the exact value of Kc after a change in conditions. B) It states that if a dynamic equilibrium is disturbed, the position of equilibrium moves to counteract the change. C) It can only be applied to reactions in a closed system. D) It is used to calculate the concentrations of reactants at equilibrium. Answer: B) It states that if a dynamic equilibrium is disturbed, the position of equilibrium moves to counteract the change.