2 upper N upper o upper c l double-headed arrow 2 upper N upper O (g) plus upper C l subscript 2 (g).

At equilibrium, the concentrations are as follows.

[NOCl] = 1.4 ´ 10–2 M

[NO] = 1.2 ´ 10–3 M

[Cl2] = 2.2 ´ 10–3 M

What is the value of Keq for the reaction expressed in scientific notation?

1.6 ´ 10–5

6.2 ´ 10–4

6.2 ´ 104

1.6 ´ 105

1.6x10^–5

Explanation:

Step 1:

The balanced equation for the reaction.

This is illustrated below:

2NOCl <=> 2NO + Cl2

Step 2:

Data obtained from the question.

[NOCl] = 1.4x10^–2 M

[NO] = 1.2x10^–3 M

[Cl2] = 2.2x10^–3 M

Equilibrium constant, K =?

Step 3:

Determination of the equilibrium constant.

The equilibrium constant for the above equation can be written as:

K = [NO]^2 [Cl2] / [NOCl]^2

Inputing the values of the [NO], [Cl2] and [NOCl], the equilibrium constant is:

K = [NO]^2 [Cl2] / [NOCl]^2

K = (1.2x10^–3)^2 x (2.2x10^–3) / (1.4x10^–2)^2

K = 1.6x10^–5

A

Explanation:

"the periodic table is arranged in order of atomic number."