The Equilibrium Constant K_c for the Reaction PCl₃(g) + Cl₂(g)

question 77

Multiple Choice

The equilibrium constant K_c for the reaction PCl₃(g) + Cl₂(g) ⇄ PCl₅(g)
Is 49 at 230°C. If 0.70 mol of PCl₃ is added to 0.70 mol of Cl₂ in a 1.00-L reaction vessel at 230°C, what is the concentration of PCl₃ when equilibrium has been established?

• A)0.049 M
• B)0.11 M
• C)0.30 M
• D)0.59 M
• E)0.83 M

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