Reversible Reactions and Equilibrium

Question 1

Which are examples of dynamic equilibrium? Check all that apply.

Revolt · Accepted Answer

A person's bank account balance remains constant because income and expenses are equal.; When humidity is high, the rate at which water evaporates from the surface of a puddle is the same as the rate at which water vapor condenses from the air, so the puddle's size does not change.; Sodium moves between many different compounds during chemical reactions on Earth, but the total amount of sodium on Earth is constant.

Question 2

At equilibrium, the forward reaction rate is the reverse reaction rate.

Revolt · Accepted Answer

equal to

Question 3

The reaction favors the The equilibrium li

Revolt · Accepted Answer

products.

Question 4

es to the

Revolt · Accepted Answer

right.

Question 5

Iodine and chlorine can react according to the following equation:At equilibrium, the concentration of ICl is about ten times higher than the concentrations of I2 or Cl2. Use the drop-down menu to complete each statement.At the beginning of the reaction, the forward reaction rate is the reverse reaction rate.

Revolt · Accepted Answer

greater than

Question 6

Identify the substances that will appear in the equilibrium constant expression for the equation:Check all that apply.

Revolt · Accepted Answer

Ag+; Zn2+

Question 7

Consider the following equilibrium:Which statement about this system is true?

Revolt · Accepted Answer

At equilibrium, the products are favored.

Question 8

Acetic acid (CH3COOH) reacts with water to form the acetate ion and the hydronium ion:At equilibrium, the concentration of CH3COOH is 2.0 × 10–1 M, the concentration of CH3COO– is 1.9 × 10–3 M, and the concentration of H3O+ is 1.9 × 10–3 M. What is the value of Keq for this reaction?

Revolt · Accepted Answer

1.8 × 10–5

Question 9

Consider the following equilibrium:N2O4(g) 2NO2(g) Keq = 5.85 x 10-3Which statement about this system is true?

Revolt · Accepted Answer

The equilibrium lies to the left.

Question 10

If the equilibrium concentration of CO is 3.4 × 10–1 M, and the equilibrium concentrationof H2 is 6.8 × 10–1 M, the equilibrium concentration of CH3OH is

Revolt · Accepted Answer

4.1 M.

Reversible Reactions and Equilibrium Answers

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