At a certain temperature,

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

Problem

At a certain temperature, 2 SO2(g)+O2(g)⇌2 SO3(g)2\,\text{SO}_2(g)+\text{O}_2(g)\rightleftharpoons 2\,\text{SO}_3(g). A sealed vessel initially contains [SO2]=0.200 M[\text{SO}_2]=0.200\,\text{M}, [O2]=0.150 M[\text{O}_2]=0.150\,\text{M}, and no SO3\text{SO}_3. When equilibrium is established, the concentration of SO3\text{SO}_3 is 0.120 M0.120\,\text{M}. Calculate the numerical value of KcK_c at this temperature.

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