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Phosphorus Pentachloride Decomposes to Phosphorus Trichloride at High Temperatures According

Question 6

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Phosphorus pentachloride decomposes to phosphorus trichloride at high temperatures according to the equation: PCl5(g) ⇌ PCl3(g) + Cl2(g)
At 250° 0.250 M PCl5 is added to the flask.If Kc = 1.80,what are the equilibrium concentrations of each gas?


A) [PCl5] = 0.0280 M,[PCl3] = 0.222 M,and [Cl2] = 0.222 M
B) [PCl5] = 0.125 M,[PCl3] = 0.474 M,and [Cl2] = 0.474 M
C) [PCl5] = 1.80 M,[PCl3] = 1.80 M,and [Cl2] = 1.80 M
D) [PCl5] = 2.27 M,[PCl3] = 2.02 M,and [Cl2] = 2.02 M

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