For the reaction at a certain temperature,

CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium

Problem

For the reaction

\text{CO}(g)+\text{Cl}_2(g)\;\rightleftharpoons\;\text{COCl}_2(g)

at a certain temperature,

K_c = 1.2\times10^{3}

. A mixture is prepared with the following concentrations:

[\text{CO}] = 0.10\,\text{M}

[\text{Cl}_2] = 0.050\,\text{M}

, and

[\text{COCl}_2] = 0.40\,\text{M}

. Which of the following gives the value of

Q_c

for this mixture and predicts how the concentration of phosgene (

\text{COCl}_2

) will change as equilibrium is approached? (a)

Q_c = 1.3\times10^{-2};\;[\text{COCl}_2]\text{ will increase}

(b)

Q_c = 1.6\times10^{3};\;[\text{COCl}_2]\text{ will decrease}

(c)

Q_c = 8.0\times10^{1};\;[\text{COCl}_2]\text{ will increase}

(d)

Q_c = 8.0\times10^{1};\;[\text{COCl}_2]\text{ will decrease}