9. Consider the following equilibrium: 2H(g)+26kJH2(g)+I2(g) If some hydrogen gas were injected into the system at constant temperature and pressure, which of the following would mostly likely occur? a. Increased [HI] c. Increased [H2] b. Decreased [HI] d. Decreased [I2] e. Both a and c f. Both a and d 10. Which of the following is true about a chemical system in equilibrium? a. All chemical reactions have stopped b. The concentration of reactants is equal to the concentration of products c. The forward and reverse reaction rates become equal d. The system will remain at equilibrium regardless of any external factors 11. What is the correct equilibrium constant equation for the following equilibrium? CaCO3(0)CaO(9)+CO2(0) a. K=CaCO3CaO[CO2 b. K=[CaO][CO2] c. K=[CaCO3CaO][CO2 d. K=[CO2] 12. Which of the following statements is verifiably true about this equilibrium? PCl5(g)PCl3(g)+Cl2(g)K=275 a. The reactants are favored in this reaction. b. PCl5 will be in higher concentration than any other components. c. If a fixed container is filled with PCl5 gas, the pressure of the container will decrease over time. d. PCl3 will be in higher concentration than PCl5 at equilibrium. 13. The pH of a 0.05M solution of H2SO4(2a) at 25C is 14. The pH of a 0.20M solution of KOH at 25C is 15. Write an equilibrium equation for the formation of a precipitate when iron (iI) nitrate solution is combined with ammonium carbonate solution