Consider the Following Reaction at a Certain Temperature

question 46

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 PCl₅(g) ?

• A)0.65 M
• B)4.35 M
• C)1.35 M
• D)essentially zero
• E)2.35 M