Chemistry

Problem

At 450 K the equilibrium constant for the homogeneous reaction

\text{H}_{2}(g)+\text{I}_{2}(g)\rightleftharpoons 2\,\text{HI}(g)

K_{c}=50.0

. A reaction vessel at 450 K is charged with the following initial concentrations: [H

_{2}

]=0.20 M, [I

_{2}

]=0.10 M, [HI]=2.00 M. (a) Calculate the reaction quotient

Q_{c}

for the mixture immediately after it is prepared. (b) State the direction in which the net reaction must proceed to reach equilibrium. (c) Briefly explain how the value of

Q_{c}

relative to

K_{c}

leads to the prediction you made in part (b).

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