AP Chemistry - Chemical Equilibrium

1

$N_{2}(g)+3H_{2}(g) \rightleftharpoons 2NH_{3}(g)$

Figure 1: Ammonia gas formation and equilibrium

Experimental data shows that the reaction shifts to the left at very cold temperatures. Using this information, what type of reaction is shown in Figure 1?

2

According to Le Chatelier's principle, which of the following occurs when you compress a system containing at least one gas species?

3

$H_{2}O_{(l)} + H_{2}O_{(l)} \rightleftharpoons H_{3}O^{+}_{(aq)} + OH^{-}_{(aq)}$

Self-ionization of water is endothermic. What is the value of the sum pH + pOH at $60^\circ C$ ?

4

$H_{2}O_{(l)} + H_{2}O_{(l)} \rightleftharpoons H_{3}O^{+}_{(aq)} + OH^{-}_{(aq)}$

Self-ionization of water is endothermic. What is the value of the sum pH + pOH at $60^\circ C$ ?

5

Which of the following stresses would lead the exothermic reaction below to shift to the right?

$A (g) + B (g) \leftrightharpoons 3C (g) + D (aq)$

6

According to Le Chatelier's principle, which of the following occurs when you compress a system containing at least one gas species?

7

$N_{2}(g)+3H_{2}(g) \rightleftharpoons 2NH_{3}(g)$

Figure 1: Ammonia gas formation and equilibrium

Experimental data shows that the reaction shifts to the left at very cold temperatures. Using this information, what type of reaction is shown in Figure 1?

8

Which of the following stresses would lead the exothermic reaction below to shift to the right?

$A (g) + B (g) \leftrightharpoons 3C (g) + D (aq)$

9

Consider the following balanced reaction.

$\small CH_{4}_{(g)} + 2O_{2}_{(g)} \rightleftharpoons CO_{2}_{(g)} + 2 H_{2}O_{(g)}$

Write the equilibrium constant expression for this reaction.

10

Which of the following is true when the reaction quotient (Q) equals the equilibrium constant (K)?

Chemical Equilibrium

Practice Questions