Chemistry Practice Problems Equilibrium Expressions Practice Problems Solution: For the following reaction, Kp = 8,532 at a given ...

# Solution: For the following reaction, Kp = 8,532 at a given temperature.2 NO(g) + Cl2(g) &lt;=&gt; 2 NOCl(g)At equilibrium, PNO = 0.734 and PCl2 = 0.303. What is the equilibrium partial pressure of NOCl?Give your answer to 3 significant figures.

###### Problem

For the following reaction, Kp = 8,532 at a given temperature.

2 NO(g) + Cl2(g) <=> 2 NOCl(g)

At equilibrium, PNO = 0.734 and PCl2 = 0.303. What is the equilibrium partial pressure of NOCl?

###### Solution

We’re being asked to determine the equilibrium partial pressure of NOCl.

We are given the equation:

2 NO(g) + Cl2(g) ↔ 2 NOCl(g)

Recall that the equilibrium constant is the ratio of the products and reactants

We use Kp when dealing with pressure and Kc when dealing with concentration:

$\overline{){{\mathbf{K}}}_{{\mathbf{p}}}{\mathbf{=}}\frac{{\mathbf{P}}_{\mathbf{products}}}{{\mathbf{P}}_{\mathbf{reactants}}}}$     $\overline{){{\mathbf{K}}}_{{\mathbf{c}}}{\mathbf{=}}\frac{\mathbf{\left[}\mathbf{products}\mathbf{\right]}}{\mathbf{\left[}\mathbf{reactants}\mathbf{\right]}}}$

Note that solid and liquid compounds are ignored in the equilibrium expression.

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