(Solved): 9. Consider the following equilibrium: \[ 2 H_{(g)}+26 \mathrm{~kJ} \leftrightarrow H_{2(g)}+I_{2(g ...

9. Consider the following equilibrium: \[ 2 H_{(g)}+26 \mathrm{~kJ} \leftrightarrow H_{2(g)}+I_{2(g)} \] 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 \( \left[\mathrm{H}_{2}\right] \) b. Decreased [HI] d. Decreased \( \left[I_{2}\right] \) 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? \( \mathrm{CaCO}_{3(0)} \mathrm{CaO}_{(9)}+\mathrm{CO}_{2(0)} \) a. \( K=\frac{|\mathrm{CaO}|\left[\mathrm{CO}_{2} \mid\right.}{\left|\mathrm{CaCO}_{3}\right|} \) b. \( K=[\mathrm{CaO}]\left[\mathrm{CO}_{2}\right] \) c. \( K=\frac{\mid \mathrm{CaO}]\left[\mathrm{CO}^{2}\right.}{\left[\mathrm{CaCO}_{3} \mid\right.} \) d. \( K=\left[\mathrm{CO}_{2}\right] \) 12. Which of the following statements is verifiably true about this equilibrium? \( \mathrm{PCl}_{5(g)} \leftrightarrow \mathrm{PCl}_{3(g)}+\mathrm{Cl}_{2(g)} \quad \mathrm{K}=275 \) a. The reactants are favored in this reaction. b. \( \mathrm{PCl}_{5} \) will be in higher concentration than any other components. c. If a fixed container is filled with \( \mathrm{PCl}_{5} \) gas, the pressure of the container will decrease over time. d. \( \mathrm{PCl}_{3} \) will be in higher concentration than \( \mathrm{PCl}_{5} \) at equilibrium. 13. The \( \mathrm{pH} \) of a \( 0.05 \mathrm{M} \) solution of \( \mathrm{H}_{2} \mathrm{SO}_{4(2 a)} \) at \( 25^{\circ} \mathrm{C} \) is 14. The \( \mathrm{pH} \) of a \( 0.20 \mathrm{M} \) solution of \( \mathrm{KOH} \) at \( 25^{\circ} \mathrm{C} \) is 15. Write an equilibrium equation for the formation of a precipitate when iron (iI) nitrate solution is combined with ammonium carbonate solution: