Equilibrium — Prelims Questions

For the reaction $2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)$, the equilibrium constant $K_p = 1.7 \times 10^{12}$ at $25^circ C$. If the initial partial pressures are $P_{SO_2} = 0.5,atm$, $P_{O_2} = 0.2,atm$, and $P_{SO_3} = 0.1,atm$, what is the direction of the net reaction?

Consider the following equilibrium: $2NOCl(g) \rightleftharpoons 2NO(g) + Cl_2(g)$. If the pressure is increased by decreasing the volume of the container at constant temperature, what will be the effect on the equilibrium?

Which of the following solutions will act as a buffer?

The solubility product ($K_{sp}$) of $AgCl$ is $1.8 \times 10^{-10}$. What is the solubility of $AgCl$ in pure water in moles per liter?

The pH of a $0.01,M$ solution of a weak acid $HA$ is 4.0. What is the acid dissociation constant ($K_a$) of the acid?

For the reaction $PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g)$, if the total pressure at equilibrium is $P$ and the degree of dissociation is $\alpha$, which of the following expressions correctly represents $K_p$?

Which of the following statements is INCORRECT regarding the effect of adding an inert gas to a system at equilibrium?