Answer
a. Increase the concentration of $NH_3$.
b. Decrease the concentration of $NH_3$.
c. Decrease the concentration of $NH_3$.
d. Increase the concentration of $NH_3$.
e. Will not affect the concentration of $NH_3$.
Work Step by Step
a. Adding some product will shift the equilibrium in the direction of reactants, increasing the concentration of $NH_3$.
b. Since the heat is on the reactants side of the reaction, when the temperature increases, the equilibrium shifts in the direction of products, decreasing the concentration of $NH_3$.
c. The reactants side has a total of 2 moles of gas, and the products side has 4 moles of gas. Therefore, increasing the volume of the container shifts the equilibrium in the direction of products, decreasing the concentration of $NH_3$.
d. The reactants side has a total of 2 moles of gas, and the products side has 4 moles of gas. Therefore, decreasing the volume of the container shifts the equilibrium in the direction of reactants, increasing the concentration of $NH_3$.
e. Adding a catalyst will not affect the equilibrium
