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

question 76

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) 0.35 M
• D) 0.59 M
• E) 0.83 M

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