Reactivity 2.3.6—The equilibrium law is the basis for quantifying the composition of an equilibrium mixture. Solve problems involving values of K and initial and equilibrium concentrations of the components of an equilibrium mixture.

Which substance is the reducing agent in the given reaction?

H⁺ (aq) + 2H₂O (l) + 2MnO₄⁻ (aq) + 5SO₂ (g) → 2Mn²⁺ (aq) + 5HSO₄⁻ (aq)

A.  H⁺

B.  H₂O

C.  MnO₄⁻

D.  SO₂

Which substance is the reducing agent in the given reaction?

H⁺ (aq) + 2H₂O (l) + 2MnO₄⁻ (aq) + 5SO₂ (g) → 2Mn²⁺ (aq) + 5HSO₄⁻ (aq)

A.  H⁺

B.  H₂O

C.  MnO₄⁻

D.  SO₂

For the reaction $\text{I}$₂(g) + 3Cl₂ (g) $\rightleftharpoons$ 2$\text{I}$Cl₃ (g) at a certain temperature, the equilibrium concentrations are (in mol dm⁻³):

[$\text{I}$₂] = 0.20, [Cl₂] = 0.20, [$\text{I}$Cl₃] = 2.0

What is the value of K_c?

A.  0.25

B.  50

C.  2500

D.  5000

For the reaction $\text{I}$₂(g) + 3Cl₂ (g) $\rightleftharpoons$ 2$\text{I}$Cl₃ (g) at a certain temperature, the equilibrium concentrations are (in mol dm⁻³):

[$\text{I}$₂] = 0.20, [Cl₂] = 0.20, [$\text{I}$Cl₃] = 2.0

What is the value of K_c?

A.  0.25

B.  50

C.  2500

D.  5000

Sulfur dioxide reacts with oxygen to form sulfur trioxide.

2SO₂ (g) + O₂ (g) $\rightleftharpoons$ 2SO₃ (g)           ΔH = −197 kJ

Which change increases the value of K_c?

A.  increasing the temperature

B.  decreasing the temperature

C.  decreasing [SO₂ (g)]

D.  decreasing [SO₃ (g)]

Sulfur dioxide reacts with oxygen to form sulfur trioxide.

2SO₂ (g) + O₂ (g) $\rightleftharpoons$ 2SO₃ (g)           ΔH = −197 kJ

Which change increases the value of K_c?

A.  increasing the temperature

B.  decreasing the temperature

C.  decreasing [SO₂ (g)]

D.  decreasing [SO₃ (g)]

Sulfur dioxide reacts with oxygen to form sulfur trioxide.

2SO₂ (g) + O₂ (g) $\rightleftharpoons$ 2SO₃ (g)           ΔH = −197 kJ

Which change increases the value of K_c?

A.  increasing the temperature

B.  decreasing the temperature

C.  decreasing [SO₂ (g)]

D.  decreasing [SO₃ (g)]

Sulfur dioxide reacts with oxygen to form sulfur trioxide.

2SO₂ (g) + O₂ (g) $\rightleftharpoons$ 2SO₃ (g)           ΔH = −197 kJ

Which change increases the value of K_c?

A.  increasing the temperature

B.  decreasing the temperature

C.  decreasing [SO₂ (g)]

D.  decreasing [SO₃ (g)]

SO₂ (g), O₂(g) and SO₃(g) are mixed and allowed to reach equilibrium at 600 °C.

Determine the value of K_c at 600 °C.

SO₂ (g), O₂(g) and SO₃(g) are mixed and allowed to reach equilibrium at 600 °C.

Determine the value of K_c at 600 °C.

SO₂ (g), O₂(g) and SO₃(g) are mixed and allowed to reach equilibrium at 600 °C.

Determine the value of K_c at 600 °C.

SO₂ (g), O₂(g) and SO₃(g) are mixed and allowed to reach equilibrium at 600 °C.

Determine the value of K_c at 600 °C.

SO₂ (g), O₂(g) and SO₃(g) are mixed and allowed to reach equilibrium at 600 °C.

Determine the value of K_c at 600 °C.

SO₂ (g), O₂(g) and SO₃(g) are mixed and allowed to reach equilibrium at 600 °C.

Determine the value of K_c at 600 °C.

At equilibrium, the concentrations of chlorine and iodine are both 0.02 mol dm^–3.

$\frac{1}{2}$Cl₂ (g) + $\frac{1}{2}$${\text{I}}_2$ (g) $\rightleftharpoons$ $\text{I}$Cl (g)       K_c = 454

What is the concentration of iodine monochloride, $\text{I}$Cl?

A.  $\frac{454}{0.02}$

B.  $454\times 0.02$

C.  $\frac{454}{0.04}$

D.  $454\times 0.04$

At equilibrium, the concentrations of chlorine and iodine are both 0.02 mol dm^–3.

$\frac{1}{2}$Cl₂ (g) + $\frac{1}{2}$${\text{I}}_2$ (g) $\rightleftharpoons$ $\text{I}$Cl (g)       K_c = 454

What is the concentration of iodine monochloride, $\text{I}$Cl?

A.  $\frac{454}{0.02}$

B.  $454\times 0.02$

C.  $\frac{454}{0.04}$

D.  $454\times 0.04$

At equilibrium, the concentrations of chlorine and iodine are both 0.02 mol dm^–3.

$\frac{1}{2}$Cl₂ (g) + $\frac{1}{2}$${\text{I}}_2$ (g) $\rightleftharpoons$ $\text{I}$Cl (g)       K_c = 454

What is the concentration of iodine monochloride, $\text{I}$Cl?

A.  $\frac{454}{0.02}$

B.  $454\times 0.02$

C.  $\frac{454}{0.04}$

D.  $454\times 0.04$

At equilibrium, the concentrations of chlorine and iodine are both 0.02 mol dm^–3.

$\frac{1}{2}$Cl₂ (g) + $\frac{1}{2}$${\text{I}}_2$ (g) $\rightleftharpoons$ $\text{I}$Cl (g)       K_c = 454

What is the concentration of iodine monochloride, $\text{I}$Cl?

A.  $\frac{454}{0.02}$

B.  $454\times 0.02$

C.  $\frac{454}{0.04}$

D.  $454\times 0.04$

0.50 mol of ${\text{I}}_2$ (g) and 0.50 mol of Br₂(g) are placed in a closed flask. The following equilibrium is established.

${\text{I}}_2$(g) + Br₂(g) $\rightleftharpoons$ 2$\text{I}$Br (g)

The equilibrium mixture contains 0.80 mol of $\text{I}$Br (g). What is the value of K_c?

A.  0.64

B.  1.3

C.  2.6

D.  64

0.50 mol of ${\text{I}}_2$ (g) and 0.50 mol of Br₂(g) are placed in a closed flask. The following equilibrium is established.

${\text{I}}_2$(g) + Br₂(g) $\rightleftharpoons$ 2$\text{I}$Br (g)

The equilibrium mixture contains 0.80 mol of $\text{I}$Br (g). What is the value of K_c?

A.  0.64

B.  1.3

C.  2.6

D.  64

0.50 mol of ${\text{I}}_2$ (g) and 0.50 mol of Br₂(g) are placed in a closed flask. The following equilibrium is established.

${\text{I}}_2$(g) + Br₂(g) $\rightleftharpoons$ 2$\text{I}$Br (g)

The equilibrium mixture contains 0.80 mol of $\text{I}$Br (g). What is the value of K_c?

A.  0.64

B.  1.3

C.  2.6

D.  64

0.50 mol of ${\text{I}}_2$ (g) and 0.50 mol of Br₂(g) are placed in a closed flask. The following equilibrium is established.

${\text{I}}_2$(g) + Br₂(g) $\rightleftharpoons$ 2$\text{I}$Br (g)

The equilibrium mixture contains 0.80 mol of $\text{I}$Br (g). What is the value of K_c?

A.  0.64

B.  1.3

C.  2.6

D.  64

$\frac{1}{2}$Cl₂(g) + $\frac{1}{2}{\text{I}}_2$(g) $\rightleftharpoons$ $\text{I}$Cl (g)    K_c = 454

What is the K_c value for the reaction below?

2 $\text{I}$Cl (g) $\rightleftharpoons$ Cl₂(g) + ${\text{I}}_{\text{2}}$(g)

A.  $2\times 454$

B.  $\frac{1}{2\times 454}$

C.  ${454}^2$

D.  $\frac{1}{{454}^2}$

$\frac{1}{2}$Cl₂(g) + $\frac{1}{2}{\text{I}}_2$(g) $\rightleftharpoons$ $\text{I}$Cl (g)    K_c = 454

What is the K_c value for the reaction below?

2 $\text{I}$Cl (g) $\rightleftharpoons$ Cl₂(g) + ${\text{I}}_{\text{2}}$(g)

A.  $2\times 454$

B.  $\frac{1}{2\times 454}$

C.  ${454}^2$

D.  $\frac{1}{{454}^2}$

$\frac{1}{2}$Cl₂(g) + $\frac{1}{2}{\text{I}}_2$(g) $\rightleftharpoons$ $\text{I}$Cl (g)    K_c = 454

What is the K_c value for the reaction below?

2 $\text{I}$Cl (g) $\rightleftharpoons$ Cl₂(g) + ${\text{I}}_{\text{2}}$(g)

A.  $2\times 454$

B.  $\frac{1}{2\times 454}$

C.  ${454}^2$

D.  $\frac{1}{{454}^2}$

$\frac{1}{2}$Cl₂(g) + $\frac{1}{2}{\text{I}}_2$(g) $\rightleftharpoons$ $\text{I}$Cl (g)    K_c = 454

What is the K_c value for the reaction below?

2 $\text{I}$Cl (g) $\rightleftharpoons$ Cl₂(g) + ${\text{I}}_{\text{2}}$(g)

A.  $2\times 454$

B.  $\frac{1}{2\times 454}$

C.  ${454}^2$

D.  $\frac{1}{{454}^2}$

For the reaction $\text{I}$₂(g) + 3Cl₂ (g) $\rightleftharpoons$ 2$\text{I}$Cl₃ (g) at a certain temperature, the equilibrium concentrations are (in mol dm⁻³):

[$\text{I}$₂] = 0.20, [Cl₂] = 0.20, [$\text{I}$Cl₃] = 2.0

What is the value of K_c?

A.  0.25

B.  50

C.  2500

D.  5000

For the reaction $\text{I}$₂(g) + 3Cl₂ (g) $\rightleftharpoons$ 2$\text{I}$Cl₃ (g) at a certain temperature, the equilibrium concentrations are (in mol dm⁻³):

[$\text{I}$₂] = 0.20, [Cl₂] = 0.20, [$\text{I}$Cl₃] = 2.0

What is the value of K_c?

A.  0.25

B.  50

C.  2500

D.  5000