Reversible Reactions and Equilibrium

Question 1

Identify the correct equilibrium constant expression for this equation:

Revolt · Accepted Answer

Answer image: https://media.edgenuity.com/EVresources/3210-09-08-20-03-task/mc001-3.jpg

Question 2

Identify the correct equilibrium constant expression for this equation:

Revolt · Accepted Answer

Answer image: https://media.edgenuity.com/EVresources/3210-09-08-20-03-task/mc002-4.jpg

Question 3

In this system, the equilibrium lies to the ✔ leftright,

Revolt · Accepted Answer

left; Selection 1: left; Selection 2: reactants.

Question 4

and the reaction favors the ✔ reactants.products.

Revolt · Accepted Answer

reactants.

Question 5

Although I2 is the stable form of iodine at low temperatures, at high temperatures the molecule can dissociate:What is the equilibrium constant expression for this system?

Revolt · Accepted Answer

Answer image: https://media.edgenuity.com/EVresources/3210-09-08-20-04-task/mc001-2.jpg

Question 6

Ammonium hydrogen sulfide (NH4HS) can decompose to ammonia and hydrogen sulfide:What is the equilibrium constant expression for this system?

Revolt · Accepted Answer

Answer image: https://media.edgenuity.com/EVresources/3210-09-08-20-05-task/mc001-3.jpg

Question 7

Consider the following chemical reaction:2CH4(g) C2H2(g) + 3H2(g)Describe what is happening within the system when it is at equilibrium in terms of concentrations, reactions that occur, and reaction rates.

Revolt · Accepted Answer

The system is in dynamic equilibrium: CH4 is decomposing into C2H2 and H2 while C2H2 and H2 react to form CH4. Both reactions continue at equal rates, so the concentrations of all substances remain constant.

Question 8

At equilibrium at 1200°C, [I2] = 9.5 ×10–2 Mand [I] = 3.2 × 10–2 M.What is the value of Keq for this system?

Revolt · Accepted Answer

1.1 × 10–2

Question 9

The equilibrium constant for this system is8.5 × 10–3. If the equilibrium concentration of NH3 is9.2 × 10–2 M, what is the equilibrium concentration of H2S?

Revolt · Accepted Answer

9.2 × 10–2 M

Question 10

Which of these did your answer include?

Revolt · Accepted Answer

The equilibrium in the system is a dynamic equilibrium.; At equilibrium, the rate of the forward reaction (CH4 decomposing into C2H2 and H2) is equal to the rate of the reverse reaction (C2H2 and H2 reacting to form CH4).; At equilibrium, the concentrations of all substances are not changing.; At equilibrium, both the forward and reverse reactions are still occurring.

Reversible Reactions and Equilibrium Answers

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