AnswersFL-2003350-Chemistry 1 HonorsReversible Reactions and Equilibrium

Reversible Reactions and Equilibrium Answers

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1
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Consider the following equilibrium:Which statement about this system is true?

Question illustration
A
At equilibrium, the reactants are favored.
B
At equilibrium, the products are favored.
2
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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

A
4.1 M.
B
6.0 M.
C
8.9 × 10⁻³ M.
3

The reaction favors the The equilibrium li

A
reactants.
B
products.
4

es to the

A
left.
B
right.
5

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

Question illustration
A
The equilibrium lies to the left.
B
The equilibrium lies to the right.
6

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.

Question illustration
A
greater than
B
less than
C
equal to
7

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?

Question illustration
A
1.8 × 10–5
B
5.5 × 104
C
9.5 × 10–3
D
1.1 × 102
8

Which are examples of equilibrium? Check all that apply.

A
Water drips out of a faucet and down a drain.
B
A person's income and expenses are equal every month.
C
The pressure exerted on the inside of a balloon by the gas inside is equal to the pressure exerted on the outside of the balloon by the atmosphere.
D
The temperature of a metal increases as heat is added to it.
9

What is the correct equilibrium constant expression for this equation?

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
10

Which are examples of reversible reactions? Check all that apply.

A
Iodine and chlorine can react to form iodine chloride. At equilibrium, the system contains a mixture of iodine, chlorine, and iodine chloride.
B
Sodium hydroxide and hydrochloric acid react readily to form sodium chloride and water. The reverse reaction does not occur.
C
Hydrogen and nitrogen react to form ammonia. At low pressure, the equilibrium system contains all three substances.
11

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

A
A cooking pot left under a dripping faucet eventually fills with water and overflows.
B
A person's bank account balance remains constant because income and expenses are equal.
C
When a small amount of sugar is added to pure water, the sugar dissolves completely.
D
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.
E
Sodium moves between many different compounds during chemical reactions on Earth, but the total amount of sodium on Earth is constant.
12

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

Question illustration
A
Ag+
B
Zn
C
Zn2+
D
Ag
13

If the equilibrium concentration of NO2 is 1.78 × 10–2 M, the equilibrium concentration of N2O4 is

A
3.04 M.
B
1.85 × 10⁻⁶ M.
C
5.42 × 10⁻² M.
14

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

A
greater than
B
less than
C
equal to
15

Identify the equilibrium constant expression for the equation:

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C

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