At 500 K the equilibrium constant for PCl (g) ⇌ PCl (g) + Cl (g) is

CHEMISTRY · Subjective · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

At 500 K the equilibrium constant for PCl5_5(g) ⇌ PCl3_3(g) + Cl2_2(g) is Kc=1.8×10−1K_c = 1.8 \times 10^{-1}. A rigid container initially holds only 0.450 M PCl5_5(g) and no products. Calculate the equilibrium concentration (in mol L−1^{-1}) of Cl2_2(g).

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