Consider the Following Reaction at a Certain Temperature

question 79

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 PCl₃(g) and Cl₂(g) is added,what is the equilibrium concentration of PCl₅(g) ?

• A)essentially 4.00 M
• B)0.58 M
• C)2.58 M
• D)3.42 M
• E)1.42 M

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