The reaction has at 450 °C

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

Problem

The reaction H2(g)+I2(g)⇌2 HI(g)\mathrm{H_2(g)+I_2(g)\rightleftharpoons 2\,HI(g)} has Kc=50.0K_c=50.0 at 450 °C. A reaction vessel initially at equilibrium contains [H2]=0.500 M[\mathrm{H_2}]=0.500\,\text{M}, [I2]=0.500 M[\mathrm{I_2}]=0.500\,\text{M}, and [HI]=3.536 M[\mathrm{HI}]=3.536\,\text{M}. An additional 1.00 mol1.00\,\text{mol} of HI\mathrm{HI} is then injected into the 2.00 L2.00\,\text{L} vessel at the same temperature. After the system re-establishes equilibrium, what is the concentration of H2\mathrm{H_2}? (a) 0.61 M0.61\,\text{M} (b) 0.50 M0.50\,\text{M} (c) 0.56 M0.56\,\text{M} (d) 0.45 M0.45\,\text{M}

Related theory

Browse the problem library