The equilibrium constant for the reaction: 2 SO_2 (g) + O_2 (g) doubleheadarrow

Question

The equilibrium constant for the reaction: 2 SO_2 (g) + O_2 (g) doubleheadarrow 2SO_3 (g) is 3.4 at a 1000 K. If [SO_2] = 0.213 M and [O_2] is 0.427 M, what is [SO_3]? Consider the system PCl_5 (g) doubleheadarrow PCl_3 (g) + Cl_2 (g) At 250 degree C, equilibrium constant, K_c is 4.0 times 10^-2. If the concentrations of PCl_3 (g) and Cl_2 (g) are both 0.325 M, while the concentration of PCl_5 (g) is 3.15 M. Calculate Q and determine if the reaction is at equilibrium. If not, will the reaction tend to form products or reactants to reach equilibrium?

Explanation / Answer

4. For the given balanced chemical reaction:-

Kc= [SO3]2/[SO2]2[O2]

3.4=[SO3]2/(0.213)2(0.427)

[SO3]=0.257 M

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