For the equilibrium 2 HI(g) ⇌ H (g) + I (g) at 700 K,

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

Problem

For the equilibrium 2 HI(g) ⇌ H2_2(g) + I2_2(g) at 700 K, Kc=0.016K_c = 0.016. At t=30 t = 30\,s the measured concentrations are [HI] = 0.20 M, [H2_2] = 0.040 M, and [I2_2] = 0.040 M. Calculate QcQ_c at this moment and state whether the reaction mixture will shift toward reactants or products as it moves toward equilibrium.

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