At a certain temperature the equilibrium constant for is

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

Problem

At a certain temperature the equilibrium constant for 2 SO2(g)+O2(g)⇌2 SO3(g)2\,\text{SO}_2(g)+\text{O}_2(g)\rightleftharpoons2\,\text{SO}_3(g) is Kc=4.0K_c=4.0. A reaction vessel contains [SO2]=0.20 M[\text{SO}_2]=0.20\,\text{M}, [O2]=0.10 M[\text{O}_2]=0.10\,\text{M}, and [SO3]=0.40 M[\text{SO}_3]=0.40\,\text{M}. Which of the following correctly gives QcQ_c and predicts the direction in which the system will proceed? (a) Qc=8.0; Q_c = 8.0;\, the system will shift toward reactants. (b) Qc=0.025; Q_c = 0.025;\, the system will shift toward products. (c) Qc=40; Q_c = 40;\, the system will shift toward reactants. (d) Qc=0.10; Q_c = 0.10;\, the system will shift toward products.

Related theory

Browse the problem library