Consider the Following Reaction at a Certain Temperature

question 34

Multiple Choice

Consider the following reaction at a certain temperature:
PCl₅(g) →PCl₃(g) + Cl₂(g)
K_c = 0.100
At equilibrium,[PCl₅] = 2.00 M and [PCl₃] = [Cl₂] = 1.00 M.If suddenly 1.00 M PCl₅(g) ,PCl₃(g) ,and Cl₂(g) is added,what is the equilibrium concentration of Cl₂(g) ?

• A)3.0 M
• B)essentially zero
• C)0.65 M
• D)2.75 M
• E)3.35 M

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