General Chemistry 2: Chemical Equilibrium

Find equilbirium concentrations of each species when starting with 3.0 M I$_2$

I$_2$ (g) $\leftrightharpoons$ 2 I (g) , K$_C$ = 3.8 x 10$^{-5}$

A 3.050 L reaction vessel contains 0.3500 mol CO, 0 mol Cl$_2$, 0.05500 mol COCl$_2$. Find the molarity of Cl$_2$ at equilibrium.

CO + Cl$_2$ $\leftrightharpoons$ COCl$_2$ , K$_C$ = 1200

At 1000 K, 0.250 mol SO$_2$ and 0.200 mol O$_2$ react in a 10.0 L reaction vessel to form 0.162 mol of SO$_3$ at equilibrium. What is K$_{eq}$ at 1000 K for the reaction?

2 SO$_2$ (g) + O$_2$ (g) $\leftrightharpoons$ 2 SO$_3$ (g)

3 A(s) + 5 B(g) $\leftrightharpoons$ 5 C(g) + 6 D(s) $\triangle$H = 0 kJ

A. Predict the change in A when D is added

B. Predict the direction of reaction when the pressure is increased

C. Predict the direction of reaction when the heat is increased

Determine how the following changes will effect the concentrations of the reactants and products.

2 NO$_2$ (g) $\leftrightharpoons$ N$_2$O$_4$ (g) $\triangle$H = -58 kJ

A. Addition of N$_2$O$_4$

B. Removal of NO$_2$

C. Increase in volume

D. Decrease in temperature

heat + 2 NO$_2$(g) $\leftrightharpoons$ N$_2$O$_4$(g)

Which of the following changes will not be effective in increasing the amount of N$_2$O$_4$? (more than one answer may be chosen)

a decrease in volume, an increase in heat, an addition of N$_2$, or removal of N$_2$O$_4$

A vessel contains 0.5 M acetic acid, which dissociates as shown below. What is the concentration of the acetate ion at equilibrium, given the K$_a$ below?

CH$_3$COOH (aq) $\leftrightharpoons$ CH$_3$OO$^{-}$ (aq) + H$^+$ (aq) , K$_a$ = 1.8 x 10$^{-5}$