Phosphorus pentachloride decomposes according to the chemical equation: PCl5(g) forward and reverse arrows PCl3(g) + Cl2(g)

Phosphorus pentachloride decomposes according to the chemical equation:

PCl5(g) forward and reverse arrows PCl3(g) + Cl2(g) Kc=1.80M at 250 degrees celcius.

A 0.293 mol sample of PCl5(g) is injected into an empty 4.35L reaction vessel held at 250 degrees celcius.

Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.

Expert Solution

Molarity of PCl5 = Number of moles of PCl5/Volume of vessel = 0.293/4.35 = 0.0674 M

Initial 0.0674 0 0

Final (0.0674-x) x x

[PCl3] = [Cl2] = 0.0660

[PCl5] = 0.0674 - 0.05660 = 0.0014

queen_honey_blossom answered 2 years ago

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