Phosphorus Pentachloride Decomposes to Phosphorus Trichloride at High Temperatures According

question 57

Multiple Choice

Phosphorus pentachloride decomposes to phosphorus trichloride at high temperatures according to the equation: PCl₅(g) ⇌ PCl₃(g) + Cl₂(g)
At 250° 0.188 M PCl₅ is added to the flask.If K_c = 1.80,what are the equilibrium concentrations of each gas?

• A) [PCl₅] = 0.0164 M, [PCl₃] = 0.172 M, and [Cl₂] = 0.172 M
• B) [PCl₅] = 0.0940 M, [PCl₃] = 0.411 M, and [Cl₂] = 0.411 M
• C) [PCl₅] = 1.80 M, [PCl₃] = 1.80 M, and [Cl₂] = 1.80 M
• D) [PCl₅] = 4.13 M, [PCl₃] = 3.94 M, and [Cl₂] = 3.94 M

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