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Chemical equilibrium practice

QCE Chemistry · Original practice questions with worked solutions

All chemical equilibrium practice questions

27 original questions · Page 2 of 2

  1. Q124 · Original practice · 4 marks
    Solid calcium carbonate and solid calcium oxide coexist with carbon dioxide at equilibrium: CaCO3(s)⇌CaO(s)+CO2(g)\mathrm{CaCO_3(s)\rightleftharpoons CaO(s)+CO_2(g)}. The vessel volume and temperature are constant.
    Chemical equilibrium
  2. Q125 · Original practice · 5 marks
    A vessel initially contains [H2]=[I2]=0.300[H_2]=[I_2]=0.300 and [HI]=0.200 mol L−1[HI]=0.200\ \mathrm{mol\,L^{-1}}. At its fixed temperature, Kc=16.0K_c=16.0 for H2(g)+I2(g)⇌2HI(g)\mathrm{H_2(g)+I_2(g)\rightleftharpoons2HI(g)}.
    Chemical equilibrium
  3. Q126 · Original practice · 5 marks
    A red solution contains the equilibrium Fe3+(aq)+SCN−(aq)⇌FeSCN2+(aq)\mathrm{Fe^{3+}(aq)+SCN^-(aq)\rightleftharpoons FeSCN^{2+}(aq)}. A small amount of Fe(NO₃)₃ is added. Its volume is negligible and the temperature is unchanged.
    Chemical equilibrium