A mixture at 700 ,K contains ,

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

Problem

A mixture at 700\,K contains [H2]=0.400 M[\mathrm{H_2}]=0.400\,\text{M}, [I2]=0.400 M[\mathrm{I_2}]=0.400\,\text{M}, and [HI]=0.100 M[\mathrm{HI}]=0.100\,\text{M}. For the reaction H2(g)+I2(g)⇌2HI(g)\mathrm{H_2(g)+I_2(g) \rightleftharpoons 2HI(g)} the equilibrium constant is Kc=50.0K_c = 50.0 at this temperature. What is the equilibrium concentration of HI(g)\mathrm{HI(g)}? (a) 0.87 M0.87\,\text{M} (b) 0.70 M0.70\,\text{M} (c) 0.44 M0.44\,\text{M} (d) 0.62 M0.62\,\text{M}

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